Question

Will give out medals. Solve the problem.

Adam wants to buy a video game system that costs $100.00. He has $28.35 in one piggy bank and $31.90 in another piggy bank. How much more money does Adam need before he can buy the video game system?

How can estimation be used to make sure the answer is reasonable?

Answer 1

A.
Answer: Adam needs $160.25 more.
Estimation: $28 + $32 = $60.
$100 + $60 = $160.
Adam needs about $160 more to buy his video game system.

B.
Answer: Adam needs $39.75 more.
Estimation: $28 + $32 = $60.
$100 – $60 = $40.
Adam needs about $40 more to buy his video game system.

C.
Answer: Adam needs $30.13 more.
Estimation: $28 + $32 = $60.
$60 ÷ 2 = $30.
Adam needs about $30 more to buy his video game system.

Answer 2

Well lets start of by seeing which ones it can't be, do you see any that don't fit at all?

Answer 3

You know that you have $28.35, which estimates to $28, and $31.90, which estimates to $32. You need $100. Where should you start?

Answer 4

To start you can see that it can't be A because the estimated need of $160 is more than the $100 you need.

Answer 5

you need $40.75 more if you combine all your money (including he piggy bank money) you will get $60.25 so the awnser is $40.75

Answer 6

whats the answer

Answer 7

tell me

Answer 8

B. You would find out how much money you have by adding together the two totals; which equals about $60. Then you would subtract the amount you have, $60, from the total you need, $100, which would show that you need about $40.

Answer 9

Sorry, my wifi went out.