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writing to explain.Kevin wants to buy a new stereo for $ 239.so far, he has saved $115. Explain how you can use mental math to find out how many more money Kevin needs to save

Sagot :

ollieboyne
You would estimate.

So round 239 to 240, and 115 to 110.

240 - 110  = $130

No work out the difference from 239 to 240 ($1) and 115 to 110 ($5), and subtract those from the answer

$130 - $5 - $1 = $124
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