Estimate any way you choose 31.29 + 58.07
What is about 31 + 58 = 89
Estimate 12.045 + 11.81 + 12.3 + 11.56
What is 12. + 12. + 12. + 12. = 48
Estimate. 6.45 + 5.88 + 5.61 + 6.03
What is 6 + 6 + 6 + 6 = 24
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