SOLUTION: Add & Subtract Mixed Number First estimate the answer. Then subtract to find the exact answer. 13(3/4)- (-2)(9/10)= Please help me!

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Question 835997: Add & Subtract Mixed Number
First estimate the answer. Then subtract to find the exact answer.
13(3/4)- (-2)(9/10)=
Please help me!
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
I am only helping with the estimate.

13%283%2F4%29-+%28-2%29%289%2F10%29
This will be positive, since you are starting with positive and subtracting a negative number.

Approximate the first term as about 12%2A%283%2F4%29, about 9.
The second term is about 2, a little less because %289%2F10%29 is near to 1, and you're doubling it.

The estimate is highlight_green%289%2B2=11%29.