thewannaknow5699 thewannaknow5699
  • 16-01-2019
  • Mathematics
contestada

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.

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JeanaShupp
JeanaShupp JeanaShupp
  • 25-01-2019

Answer: identity property and associative property


Step-by-step explanation:

Given expression:[tex](3.4\times 4)\times (25\times 1)[/tex]

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

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

[tex](3.4\times 4)\times (25)[/tex]

Then apply associative property , we get

[tex](3.4\times 4)\times (25)=(3.4)\times(4\times25)[/tex]

[tex]=3.4\times(100)=3.4\times100=340[/tex]

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