stasia02
stasia02
23-09-2016
Mathematics
contestada
Estimate then find the difference or sum
86+17
Respuesta :
Аноним
Аноним
23-09-2016
Estimation for addition: 8
6
rounds up to 90 and 1
7
rounds up to 20 so:
90 + 20 = 110
Estimation for subtraction is the same thing but with subtraction
90 - 20 = 70
Now for the exact answers:
86 + 17 = 103
86 - 17 = 69
Your answers are
110, 70, 103, and 69.
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