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Which two properties can you use to find (3.4 x 4) x (25 x 1) mentally? Explain. Remember that the parentheses tell you which factors to multiply first.

1 Answer

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Answer: identity property and associative property


Explanation:

Given expression:
(3.4* 4)* (25* 1)

We can solve this product mentally by the two properties,.

At first, solve the second bracket by identity then the product becomes


(3.4* 4)* (25)

Then apply associative property , we get


(3.4* 4)* (25)=(3.4)*(4*25)


=3.4*(100)=3.4*100=340

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