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Which shows the best use of the associative and commutative properties t make simplifying 2/5-15+ 8-1/5+3 easier? A [2/5 + (-15)] +[8+(-1/5)+3 B.[3+2/5+(-15)] +[(-1/5) + 8) C.[2/5+(-1/5)]+[8+3+(-15)] D.[2/5+8+(-15)]+[3+(-1/5)]

Sagot :

The commutative property in math is where numbers that you operate can swapped from their position without changing the answer.

For example 4 + 3 = 7 and 3 + 4 = 7

The associative property in math is where you can add or perform product regardless of how the numbers are grouped. For example;

a +{ b+ c} ={ a+b} + c -----the same applies in product

So in this case,

2/5 - 15 + 8 - 1/5 + 3 -----

In A ;

[2/5 -15 ] + [8-1/5] + 3 -------we notice the grouping is the same as that of the question.No changes. Even in applying the commutative property the order is the same as that in question