(1.257 0.25)x0.4用简便方法计算

2024-11-22 20:55:14
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回答(1):

(1.257+ 0.25)x0.4
=(1.5 +0.007)x0.4
=1.5x0.4 +0.007x0.4
=0.6+0.0028
=0.6028