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]
