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Question

The commutative property for rational numbers does not hold for which of the following mathematical operations?

A
Subtraction and division.
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B
Addition and subtraction.
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C
Multiplication and addition.
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D
Division and multiplication.
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Solution

The correct option is A Subtraction and division.
Let us take 14 and 27 as examples of rational numbers and check each operation.

Addition = 14 + 27 = 128 and
27 + (14) = 128

Subtraction = 14 - 27 = 1528 and
27 - (14) = 1528

Multiplication = 14 × 27 = 114 and
27 × (14) = 114

Division = 14 ÷ 27 = 78 and
27 ÷ (14) = 87

As we can see that the commutative property does not hold under subtraction and division for rational numbers.

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