Math estimate with benchmark
posted by marko .
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

those estimates look ok.
Maybe 44/10 should just be 4.
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