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September 18, 2014

Homework Help: Math estimate with benchmark

Posted by marko on Tuesday, January 10, 2012 at 8:09pm.

Could you please check ifI have these right?
i need to estimate using benchmarks
(show work)

1/8 + 3/5
i got:
0 + 1/2 = 1/2
_________________

4 3/4 - 1 2/3
i got:

4 +1 = 5 - 1 +1 = 2
so 5 - 2 = 3
_____________________

43 7/8 divide 10 1/3
43 + 1 = 44 10 +0 = 10
so 44 divide by 10 = 4.4

________________________
2 5/6 * 6 1/0
i got:
3 * 6 = 18
______________________

4/4 + 1/2
igot: 1 + 1/2 = 1 1/2

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