# Tes Operasi Bilangan Bulat

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| By Johndaryono
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Johndaryono
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Quizzes Created: 1 | Total Attempts: 1,398
Questions: 10 | Attempts: 1,401

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• 1.

### 3 - 9 =

• A.

12

• B.

6

• C.

-12

• D.

-6

• E.

0

D. -6
Explanation
The correct answer is -6 because when you subtract 9 from 3, you are essentially moving 9 units to the left on the number line. Starting at 3 and moving 9 units to the left will bring you to -6.

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• 2.

### -21  +  (-28)

• A.

-7

• B.

-49

• C.

7

• D.

49

• E.

Salah semua

B. -49
Explanation
The given expression is -21 + (-28). When adding two negative numbers, we add their absolute values and keep the negative sign. Therefore, the absolute values of -21 and -28 are 21 and 28 respectively. Adding them gives us 49. Since both numbers are negative, the result is -49.

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• 3.

### 13 + (-9) + 7

• A.

11

• B.

4

• C.

-11

• D.

-4

• E.

3

A. 11
Explanation
The correct answer is 11 because when you add 13 and -9, you get 4. Then, when you add 4 and 7, you get 11.

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• 4.

### -15 + 13 + (-4)

• A.

-2

• B.

-6

• C.

-24

• D.

4

• E.

5

B. -6
Explanation
The given expression involves adding three numbers: -15, 13, and -4. When we add -15 and 13, we get -2. Then, when we add -2 and -4, we get -6. Therefore, the correct answer is -6.

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• 5.

### -35   -  18

• A.

17

• B.

-7

• C.

-17

• D.

-53

• E.

-63

D. -53
Explanation
The correct answer is -53. To arrive at this answer, we subtract 18 from -35, which gives us -53.

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• 6.

### 18    -  (-13)

• A.

5

• B.

-5

• C.

-31

• D.

31

• E.

Salah semua

D. 31
Explanation
The correct answer is 31 because when you subtract a negative number from a positive number, you add the two numbers together. In this case, 18 minus (-13) is the same as 18 plus 13, which equals 31.

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• 7.

### -45   -  (-28)

• A.

17

• B.

-73

• C.

-17

• D.

73

• E.

72

C. -17
Explanation
The correct answer is -17. This can be determined by subtracting -28 from -45, which gives us -17.

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• 8.

### -12 - 13 - (-4)

• A.

-29

• B.

3

• C.

-21

• D.

-5

• E.

5

C. -21
Explanation
The correct answer is -21. This is because when subtracting a negative number from another negative number, it is equivalent to adding the positive value of that number. Therefore, -12 - 13 + 4 equals -21.

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• 9.

### .Suhu udara di dalam lemari es             -10o C,setelah listrik mati sebentar suhu menjadi 1o C,Berapa derajat perubahan suhu terjadi ?

• A.

9 derajat

• B.

-9 derajat

• C.

11 derajat

• D.

-11 derajat

• E.

0 derajat

C. 11 derajat
Explanation
The temperature inside the refrigerator was initially at -10o C. After a short power outage, the temperature increased to 1o C. Therefore, the temperature change is calculated by subtracting the initial temperature from the final temperature, which is 1o C - (-10o C) = 11o C. Hence, the correct answer is 11 derajat.

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• 10.

### Suhu di puncak gunung -6o C, karena terjadi hujan salju,suhunya turun lagi 8o C, berapakah suhu udara di puncak gunung tersebut setelah turun hujan ?

• A.

2 derajat celcius

• B.

-2 derajat celcius

• C.

14 derajat celcius

• D.

-14 derajat celcius

• E.

-6 derajat celcius

D. -14 derajat celcius
Explanation
After the snowfall, the temperature on the mountain peak decreases by 8 degrees Celsius. Since the initial temperature was -6 degrees Celsius, subtracting 8 degrees Celsius from it gives us -14 degrees Celsius. Therefore, the air temperature on the mountain peak after the rain is -14 degrees Celsius.

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