2.6×9.98和0.032×2.5×1.25用简便方法计算

题目

2.6×9.98和0.032×2.5×1.25用简便方法计算

答案

2.6×9.98
=2.6x10-2.6x0.02=26-0.052=25.9480.032×2.5×1.25
=0.4x0.08x2.5x1.25
=(0.4x2.5)x(0.08x1.25)
=1x0.1
=0.1
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