# [quiz 1]_year 7_numbers Classification And Number Operation

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Eli
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Quizzes Created: 2 | Total Attempts: 161
Questions: 10 | Attempts: 113  Settings  • 1.

• 2.

• 3.

• 4.

### Evaluate 120 : (8-2) + 15 =

• A.

18

• B.

25

• C.

28

• D.

35

D. 35
Explanation
The given expression can be simplified by first evaluating the parentheses. 8-2 equals 6. Then, adding 15 to 6 gives us 21. Finally, dividing 120 by 21 equals 5.714. Since none of the answer choices match this result, the correct answer is not available.

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• 5.

### Evaluate (16 + 4) x (16 - 8 +2) =

• A.

198

• B.

200

• C.

250

• D.

20

B. 200
Explanation
The expression can be simplified using the order of operations, which states that we should first perform any calculations inside parentheses. Inside the first set of parentheses, 16 + 4 equals 20. Inside the second set of parentheses, 16 - 8 + 2 equals 10. Finally, we multiply 20 by 10 to get 200.

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• 6.

### Zero is a natural number.

• A.

True

• B.

False

B. False
Explanation
Zero is not considered a natural number. Natural numbers are typically defined as the positive integers starting from 1. Zero, on the other hand, represents the absence or lack of quantity, and is not considered a positive integer. Therefore, the statement that zero is a natural number is false.

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• 7.

### Select the ones you like about '7' in number classification!

• A.

Rational numbers

• B.

irrational numbers

• C.

Integers numbers

• D.

Natural numbers

C. Integers numbers
D. Natural numbers
Explanation
The number '7' belongs to the category of integers and natural numbers. Integers are whole numbers that include both positive and negative numbers, and natural numbers are positive whole numbers. Since '7' is a positive whole number and not a fraction or decimal, it falls under both classifications.

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• 8.

### Select the ones you like about '-3' in number classification!

• A.

Integers

• B.

Natural

• C.

Whole

• D.

Rational

A. Integers
D. Rational
Explanation
The number -3 is classified as an integer because it is a whole number that can be positive, negative, or zero. It is also classified as rational because it can be expressed as a fraction, -3/1.

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• 9.

### The total cost of 8 schoolbags is Rp192.000,00. Find the total cost of 5 similar schoolbags.

• A.

Rp100.000,00

• B.

Rp120.000,00

• C.

Rp160.000,00

• D.

Rp220.000,00

B. Rp120.000,00
Explanation
If the total cost of 8 schoolbags is Rp192.000,00, we can find the cost of 1 schoolbag by dividing the total cost by the number of schoolbags. So, the cost of 1 schoolbag is Rp192.000,00 / 8 = Rp24.000,00. To find the cost of 5 similar schoolbags, we multiply the cost of 1 schoolbag by 5. Therefore, the total cost of 5 similar schoolbags is Rp24.000,00 * 5 = Rp120.000,00.

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