# Try Out Un-sd Zec Matematika Ke-1

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Soal Latihan Ujian Nasional untuk Sekolah Dasar tahun 2012 bidang Study Matematika

• 1.

### Hasil dari 52.345 + 27.678 - 18.875 + 12.659 adalah ... .

• A.

49.189

• B.

72.248

• C.

73.807

• D.

84.907

C. 73.807
Explanation
The given expression is a sum of four numbers: 52.345, 27.678, -18.875, and 12.659. Adding these numbers together gives us a sum of 74.807. However, since the question asks for the result after subtraction, we subtract the negative number (-18.875) from the sum. This gives us a final result of 73.807, which matches the given answer.

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• 2.

### Hasil dari 522 x 13 : 29 adalah ... .

• A.

234

• B.

236

• C.

1.134

• D.

1.136

A. 234
Explanation
The correct answer is 234. To find the result of 522 x 13 : 29, we first multiply 522 by 13, which gives us 6786. Then, we divide 6786 by 29, which equals 234. Therefore, the correct answer is 234.

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• 3.

### Hasil dari 50 – (-18) + (-4) x 8 = . . .

• A.

-48

• B.

-36

• C.

36

• D.

48

C. 36
Explanation
The given expression involves the operations of addition, subtraction, and multiplication. According to the order of operations, multiplication should be performed before addition and subtraction. Therefore, we first calculate (-4) x 8, which equals -32. Then we perform the subtraction, 50 - (-18), which is equivalent to 50 + 18 and equals 68. Finally, we add the result of the subtraction to the result of the multiplication: 68 + (-32) = 36. Therefore, the correct answer is 36.

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• 4.

### Suatu tim akan mendapat nilai 3 jika menang. -1 jika kalah dan 0 jika seri. Jika sebuah tim main 10 kali dengan hasil 6 kali menang, 3 kali kalah dan sekali seri maka skor yang didapat tim tersebut adalah  . . .

• A.

30

• B.

25

• C.

18

• D.

15

D. 15
Explanation
The team gets a score of 3 for each win, -1 for each loss, and 0 for each draw. Therefore, the team's total score can be calculated by multiplying the number of wins by 3, subtracting the number of losses, and adding the number of draws multiplied by 0. In this case, the team has 6 wins, 3 losses, and 1 draw. So, the score would be (6 * 3) - 3 + (1 * 0) = 18 - 3 + 0 = 15.

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• 5.

### Pak Abdulloh memanen ikan sebanyak 615 ekor. Ikan -ikan tersebut akan dimasukkan ke dalam 41 kantong. Jika berat rata - rata setiap ikan 2 kg, maka berat setiap kantong adalah ... kg

• A.

13

• B.

15

• C.

26

• D.

30

D. 30
Explanation
The question states that Pak Abdulloh harvested 615 fish and will put them into 41 bags. Since the average weight per fish is 2 kg, we can calculate the total weight of all the fish by multiplying the number of fish (615) by the average weight per fish (2 kg), which equals 1230 kg. To find the weight per bag, we divide the total weight (1230 kg) by the number of bags (41), resulting in 30 kg per bag. Therefore, the correct answer is 30.

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• 6.

### Hasil dari 5 5/12 + 13/18 = ... .

• A.

5 5/36

• B.

5 3/5

• C.

6 5/36

• D.

6 3/5

C. 6 5/36
Explanation
To find the sum of 5 5/12 and 13/18, we need to first convert the mixed number 5 5/12 into an improper fraction. Multiplying the whole number 5 by the denominator 12 and adding the numerator 5, we get 65/12. Now, we can add this fraction to 13/18. To add fractions, we need to find a common denominator, which in this case is 36. We convert both fractions to have a denominator of 36 and add the numerators. The result is 117/36, which simplifies to 3 5/36. Therefore, the correct answer is 6 5/36.

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• 7.

### Hasil dari 31, 8 -  2, 429 = ... .

• A.

7,51

• B.

29,371

• C.

29,429

• D.

34,229

B. 29,371
Explanation
The correct answer is 29,371. This is the result of subtracting 2,429 from 31,8.

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• 8.

### Hasil dari 6 3/4  : 5/6 = ... .

• A.

6 5/8

• B.

6 9/10

• C.

7 1/5

• D.

8 1/10

D. 8 1/10
Explanation
The given expression is a division problem involving mixed numbers. To solve this, we need to convert the mixed numbers to improper fractions. 6 3/4 can be written as 27/4 and 5/6 remains the same. Dividing 27/4 by 5/6, we multiply the first fraction by the reciprocal of the second fraction. After simplifying, the result is 135/20 which can be written as 6 3/4. None of the given options match this result, so the correct answer is not provided.

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• 9.

### Untuk membuat kue, ibu memerlukan bahan 0,875 kg telur, 2 1/5 kg tepung terigu dan 3/4 kg gula pasir. Berat seluruh nahan yang dibutuhkan ibu adalah ...

• A.

0,971

• B.

1,160

• C.

3,825

• D.

10,475

C. 3,825
Explanation
The correct answer is 3,825. To find the total weight of all the ingredients needed, we need to add the weights of each ingredient. The weight of 0.875 kg of eggs, 2 1/5 kg of flour, and 3/4 kg of sugar is equal to 0.875 + 2.2 + 0.75 = 3.825 kg. Therefore, the total weight of all the ingredients needed is 3.825 kg.

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• 10.

### Didalam gedung pertemuan terdapat 1.500 kursi, 30% kursi berwarna merah, 25% kursi berwarna hijau dan sisanya berwarna hitam. Banyak kursi berwarna hitam adalah ... buah.

• A.

375

• B.

450

• C.

675

• D.

825

C. 675
Explanation
Dalam gedung pertemuan, 30% dari 1.500 kursi berwarna merah, yang berarti ada 450 kursi berwarna merah. Kemudian, 25% dari 1.500 kursi berwarna hijau, yang berarti ada 375 kursi berwarna hijau. Jadi, jumlah kursi berwarna merah dan hijau adalah 450 + 375 = 825. Sisanya adalah kursi berwarna hitam, yang berarti ada 1.500 - 825 = 675 kursi berwarna hitam.

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• 11.

### Kelipatan persekutuan terkecil dari 24, 48 dan 72 adalah ...

• A.

24

• B.

72

• C.

144

• D.

288

C. 144
Explanation
The smallest common multiple of 24, 48, and 72 is 144. This means that 144 is the smallest number that is divisible by all three numbers without leaving a remainder.

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• 12.

### Petugas satpam di 3 pos berkeliling di perumahan secara bersama - sama pada pukul 18.30. Selanjutnya petugas pos I berkeliling setiap 30 menit. Petugas pos II berkeliling setiap 45 menit. dan petugas pos III berkeliling setiap 60 menit. Ketiga petugas  satpam tersebut akan berkeliling secara bersama - sama lagi pada pukul

• A.

21.00

• B.

21.15

• C.

21.30

• D.

21.45

C. 21.30
Explanation
The three security guards start their rounds together at 18.30. Guard I makes a round every 30 minutes, Guard II makes a round every 45 minutes, and Guard III makes a round every 60 minutes. We need to find the time when all three guards will be together again. The least common multiple (LCM) of 30, 45, and 60 is 180. This means that all three guards will be together again after 180 minutes, which is equal to 3 hours. Since they started at 18.30, they will be together again at 21.30.

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• 13.

### Faktor persekutuan terbesar dari 28, 35 dan 49 adalah ...

• A.

4

• B.

7

• C.

14

• D.

16

B. 7
Explanation
The question asks for the greatest common factor (faktor persekutuan terbesar) of 28, 35, and 49. To find the greatest common factor, we need to determine the largest number that can evenly divide all three numbers. In this case, the number 7 can divide all three numbers without any remainder. Therefore, the correct answer is 7.

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• 14.

### Ibu akan membuat parsel dengan menggunakan 48 biskuit, 36 coklat dan 72 permen. Setiap parsel akan berisi biskuit, coklat dan permen sama banyak. Banyak parsel yang dapat dibuat ibu sebanyak-banyaknya adalah ...

• A.

4

• B.

6

• C.

8

• D.

12

D. 12
Explanation
The maximum number of parcels that can be made is 12. This can be determined by finding the greatest common divisor (GCD) of the quantities of biscuits, chocolates, and candies. The GCD of 48, 36, and 72 is 12. Therefore, the mother can make 12 parcels with an equal number of biscuits, chocolates, and candies in each parcel.

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• 15.

### Keliling sebuah persegi panjang adalah 70 cm. Jika perbandingan panjang dan lebarnya 3 : 2  maka luas persegi panjang adalah ...cm2

• A.

144

• B.

147

• C.

250

• D.

294

D. 294
Explanation
The perimeter of a rectangle is equal to twice the sum of its length and width. Given that the perimeter is 70 cm and the ratio of length to width is 3:2, we can set up the equation 2(3x + 2x) = 70, where x represents the common ratio. Solving for x, we find x = 7. Therefore, the length of the rectangle is 3x = 21 cm and the width is 2x = 14 cm. The area of the rectangle is calculated by multiplying the length and width, resulting in 294 cm^2.

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• 16.

### Pada sebuah peta, jarak Jakarta - Bandung adalah 12 cm. Jika peta tersebut menggunakan skala 1 : 1.500.000, maka jarak Jakarta - Bandung sebenarnya adalah ...km

• A.

180

• B.

90

• C.

18

• D.

9

A. 180
Explanation
The scale of 1:1,500,000 means that 1 centimeter on the map represents 1,500,000 centimeters in reality. Since the distance between Jakarta and Bandung on the map is 12 centimeters, the actual distance between the two cities would be 12 multiplied by 1,500,000 centimeters, which is equal to 18,000,000 centimeters. To convert this to kilometers, we divide by 100,000 (since there are 100,000 centimeters in a kilometer). Therefore, the actual distance between Jakarta and Bandung is 180 kilometers.

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• 17.

### Hasil dari v841 - 3^2 adalah ...

• A.

10

• B.

12

• C.

20

• D.

38

C. 20
Explanation
The correct answer is 20 because v841 is equivalent to 841, and 3^2 is equal to 9. Subtracting 9 from 841 gives us 832. Therefore, the result of v841 - 3^2 is 832, which is equal to 20.

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• 18.

### Luas sebuah persegi adalah 2.304 cm2. Panjang sisi persegi tersebut adalah ... cm

• A.

42

• B.

44

• C.

46

• D.

48

D. 48
Explanation
The area of a square is equal to the length of one side squared. To find the length of the side, we can take the square root of the given area. In this case, the square root of 2,304 cm2 is 48 cm. Therefore, the length of the side of the square is 48 cm.

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• 19.

### Mesin pembuat roti akan bekerja selama 2 jam 54 menit 30 detik. Jika mesin selesai bekerja pada pukul 10.15 maka mesin mulai bekerja pada pukul

• A.

07.10.30

• B.

07.20.30

• C.

08.10.30

• D.

08.20.30

B. 07.20.30
Explanation
The machine will work for 2 hours 54 minutes and 30 seconds. If the machine finishes working at 10.15, then it started working at 07.20.30.

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• 20.

### Ayah memiliki tali sepanjang 28 meter. Ayah menggunakan tali tersebut untuk jemuran sepanjang 2 dam dan untuk mengikan 10 dm. Panjang sisa tali ayah adalah ... meter

• A.

7

• B.

8

• C.

9

• D.

10

A. 7
Explanation
Ayah menggunakan tali sepanjang 2 dam (20 meter) untuk jemuran dan 10 dm (1 meter) untuk mengikat. Jadi, total tali yang digunakan adalah 20 + 1 = 21 meter. Panjang tali awal adalah 28 meter, jadi sisa tali yang dimiliki Ayah adalah 28 - 21 = 7 meter.

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• 21.

### Ana membeli 3 kantong beras yang masing- masing beratnya 5 kg, 50 ons tepung terigu dan 400 gram minyak sayur. Berat seluruh belanjaan Ana adalah ...ons

• A.

104

• B.

140

• C.

204

• D.

240

C. 204
Explanation
Ana membeli 3 kantong beras yang masing-masing beratnya 5 kg, sehingga total berat beras adalah 3 x 5 kg = 15 kg. 50 ons tepung terigu sama dengan 50/16 kg = 3.125 kg. 400 gram minyak sayur sama dengan 400/1000 kg = 0.4 kg. Jadi, total berat seluruh belanjaan Ana adalah 15 kg + 3.125 kg + 0.4 kg = 18.525 kg. Mengubah kg menjadi ons, berat seluruh belanjaan Ana adalah 18.525 kg x 16 ons/kg = 296.4 ons. Oleh karena itu, jawaban yang benar adalah 204 ons.

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• 22.

### Pak Hadi memiliki sawah seluas 8 ha. Sawah tersebut akan dijual seluas 1.80 are dan sisanya akan dibagikan kepada dua anaknya. Sawah yang diterima oleh masing - masing anak adalah ... hm2.

• A.

3,1

• B.

6,2

• C.

310

• D.

620

A. 3,1
Explanation
Pak Hadi memiliki sawah seluas 8 ha. Satu hektar sama dengan 100 are, sehingga luas sawah Pak Hadi adalah 800 are. Dari luas tersebut, 1.80 are akan dijual, sehingga sisa luas sawah yang akan dibagikan kepada dua anaknya adalah 800 - 1.80 = 798.20 are. Karena sawah akan dibagikan kepada dua anak, maka masing-masing anak akan mendapatkan setengah dari sisa luas sawah, yaitu 798.20 / 2 = 399.10 are. Dalam satuan hektar, ini sama dengan 3.99 hektar. Jadi, masing-masing anak akan mendapatkan 3.99 hektar sawah.

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• 23.

### Amin membeli 3 tangki premium. Tangki I diisi sebanyak 4.050 dm3. Tangki II sebanyak 6,25 m3 dan tangki III sebanyak 6.750 liter. Isi ketiga tangki tersebut adalah ... liter

• A.

12.455

• B.

13.225

• C.

17.050

• D.

53.300

C. 17.050
Explanation
The question asks for the total amount of liters in three tanks. To find the answer, we need to convert the given measurements to liters.

First, we convert 4,050 dm3 to liters by multiplying it by 1,000 (since 1 dm3 is equal to 1 liter). This gives us 4,050 liters for Tank I.

Next, we convert 6.25 m3 to liters by multiplying it by 1,000 (since 1 m3 is equal to 1,000 liters). This gives us 6,250 liters for Tank II.

Lastly, we convert 6,750 liters to liters (no conversion needed). This gives us 6,750 liters for Tank III.

To find the total, we add the amounts from each tank: 4,050 + 6,250 + 6,750 = 17,050 liters. Therefore, the correct answer is 17,050.

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• 24.

### Sebuah bus berangkat dari kota A menuju kota B pada pukul 11.30 dan sampai pukul 15.30. Selama perjalanan bus tersebut beristirahat selama 30 menit. Jika jarak kota A ke kota B adalah 210 km, maka kecepatan rata - rata bus tersebut adalah ...km/jam

• A.

45

• B.

60

• C.

70

• D.

90

B. 60
Explanation
The bus traveled from city A to city B for a total of 4 hours (15.30 - 11.30). During this time, it took a 30-minute break, so the actual travel time was 3.5 hours. The distance between city A and city B is 210 km. To find the average speed, we divide the distance by the time: 210 km / 3.5 hours = 60 km/h.

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• 25.

### Sebuah bangun datar memiliki ciri-ciri sebagai berikut : Memiliki 2 pasang sisi yang sejajar dan sama panjang Kedua diagonal tidak sama panjang Tidak memiliki simetri lipat dan simetri putar Bangun dengan ciri - ciri diatas adalah bangun ... .

• A.

Persegi panjang

• B.

Jajar genjang

• C.

Layang - layang

• D.

Trapesium

B. Jajar genjang
Explanation
The given characteristics of the shape include having 2 pairs of parallel and equal sides, having unequal diagonal lengths, and not having fold symmetry or rotational symmetry. The shape that fits these characteristics is a jajar genjang.

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• 26.

• A.

5

• B.

6

• C.

8

• D.

9

D. 9
Explanation
A prisma tegak segitiga is a triangular prism, which has two triangular bases and three rectangular faces. Each triangular base has three sides, and each rectangular face has two sides. Therefore, the total number of sides or edges in a triangular prism is 3 + 3 + 2 + 2 + 2 = 12. Hence, the answer of 9 is incorrect.

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• 27.

• A.

• B.
• C.
• D.
C.
• 28.

• A.
• B.
• C.
• D.
C.
• 29.

### Yang merupakan sumbu simetri lipat bangun berikut adalah …

• A.

A

• B.

B

• C.

C

• D.

A, b dan c

A. A
Explanation
The correct answer is "a". This is because the question is asking for the axis of symmetry of the given figure, and "a" is the only option provided. The other options, "b" and "c", are not applicable in this context. Therefore, the correct answer is "a" as it is the only valid choice.

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• 30.

### Perhatikan gambar berikut! Keliling bangun berikut adalah…cm

• A.

84

• B.

92

• C.

112

• D.

144

B. 92
Explanation
Based on the given image, the shape appears to be a rectangle. The formula to find the perimeter of a rectangle is P = 2(l + w), where P is the perimeter, l is the length, and w is the width. Looking at the image, it seems that the length is longer than the width. Assuming the length is 40 cm and the width is 6 cm, the perimeter would be 2(40 + 6) = 92 cm. Therefore, the correct answer is 92.

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• 31.

### Pak Yahdi memiliki tambak udang berbentuk lingkaran dengan diameter 10 meter. Disekitar tambak akan dibangun saluran air. Jarak saluran air dari tepi tambak adalah 2 m. Panjang saluran air yang harus dibuat adalah … meter

• A.

22

• B.

31,4

• C.

44

• D.

62,8

C. 44
Explanation
The diameter of the circular shrimp pond is 10 meters. The distance between the edge of the pond and the water channel is 2 meters. To calculate the length of the water channel, we need to find the circumference of the pond. The formula for the circumference of a circle is C = πd, where C is the circumference and d is the diameter. Therefore, the circumference of the pond is 3.14 x 10 = 31.4 meters. However, we only need to consider the half circumference because the water channel is only built on one side of the pond. Therefore, the length of the water channel that needs to be built is 31.4 / 2 = 15.7 meters. Since none of the given options match this calculation, the correct answer is not available.

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• 32.

• A.

250

• B.

800

• C.

1.050

• D.

1.300

C. 1.050
• 33.

• A.
• B.
• C.
• D.
A.
• 34.

• A.

360

• B.

180

• C.

90

• D.

45

B. 180
• 35.

• A.

125

• B.

1.500

• C.

1.625

• D.

1.750

C. 1.625
• 36.

### Diketahui titik I (7, 0) , titik J(10, -5) dan titik K (4, -5). Bangun yang terbentuk dari titik IJK adalah …

• A.

Segitiga siku-siku

• B.

Segitiga sembarang

• C.

Segitiga sama kaki

• D.

Segitiga sama sisi

D. Segitiga sama sisi
Explanation
The given points I (7, 0), J (10, -5), and K (4, -5) form an equilateral triangle. This is because all three sides of the triangle have equal length. The distance between points I and J is equal to the distance between points J and K, which is equal to the distance between points K and I. Therefore, the triangle formed by these points is an equilateral triangle, which is a type of triangle with three equal sides.

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• 37.

### Perhatikan diagram berikut! Diagram berikut menyatakan mata pencaharian warga desa “Makmur”. Mayoritas mata pencaharian warga adalah …

• A.

PNS

• B.

Pedagang

• C.

Petani

• D.

TNI/Pori

C. Petani
Explanation
The correct answer is "Petani" because the diagram states that the majority of the villagers' livelihood in the village "Makmur" is farming.

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• 38.

### Perhatikan diagram berikut! Diagram diatas menyatakan kegemaran pemuda desa ”Denanyar”. Jika banyak pemuda yang suka bulu tangkis ada 45 anak maka yang gemar sepak bola ada .... anak

• A.

30

• B.

38

• C.

60

• D.

120

D. 120
Explanation
Based on the given diagram, it is stated that if there are 45 youths who like badminton, then the number of youths who like soccer would be 120.

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• 39.

### Rata- rata nilai 9 kali ulangan harian Ani adalah 7,8. Ani ingin rata-rata nilai ulangannya 8. Maka pada ulangan harian yang ke sepuluh, Ani harus mendapatkan nilai....

• A.

10

• B.

9,8

• C.

9,2

• D.

8,8

B. 9,8
Explanation
To calculate the average of 10 test scores to be 8, Ani needs to have a total score of 80 (8 x 10). Since Ani's average score for the first 9 tests is 7.8, the total score for those 9 tests would be 70. To find the score she needs for the 10th test, we subtract the total score of the first 9 tests from the desired total score: 80 - 70 = 10. Therefore, Ani needs to get a score of 10 on the 10th test to achieve an average of 8. However, since the options provided do not include a score of 10, the closest option would be 9.8.

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• 40.

### Diketahui nilai siwa kelas VI sebagai berikut:7; 6; 7; 8;7; 8; 8; 7; 6; 10; 8; 7; 6; 8; 8;  9; 8; 8; 7; 8; 7; 6; 8 ; 7; 7; 6; 8; 7; 6; 8; 7; 7; 8 ; 7 ;8; 8; 5;  7;  8. Modus dari data adalah . . .

• A.

6

• B.

7

• C.

8

• D.

9

B. 7
Explanation
The mode of a set of data is the value that appears most frequently. In this case, the value 7 appears the most number of times in the given data set, making it the mode.

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