4.89+4.87+483+4.85+4.84+4.86+4.88用简便方法计算

如题所述

4.89+4.87+483+4.85+4.84+4.86+4.88
=4.8*7+(0.09+0.07+0.03+0.05+0.04+0.06+0.08)
=4.8*7+(0.09+0.05+0.08+(0.07+0.03)+(0.04+0.06))
=33.6+(0.22+0.1+0.1)
=33.6+0.42
=34.02

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