Twin72
Twin72
06-08-2015
Mathematics
contestada
whats the most accurate estimation of 65 77
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Аноним
Аноним
06-08-2015
Addition: 70 + 80 = 150. You round 65 up because the ones digit is greater than and the same with 77.
Multiplication: Round up since both ones digits are bigger than 5. 70 x 80= 5600.
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