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Mathematics
Deborah Flores
8 September, 17:23
Estimate the sum of 21+17.
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Kenny Morris
8 September, 20:46
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40 Is The Sum Of 21+17.
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Reina Mccarthy
8 September, 21:15
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When estimating sums, you need to round to get to the answer.
So in the problem:
21+17 = ?
I round 21 to 20.
I round 17 to 20.
So know, the problem is:
20+20
The answer to 20 + 20 equals 40.
The answer is 40.
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