用简便方法计算:0.25×1/7+1/4×6/7-1/4

问题描述:

用简便方法计算:0.25×1/7+1/4×6/7-1/4

0.25×1/7+1/4×6/7-1/4
=0.25x1/7+0.25x6/7-0.25
=(1/7+6/7-1)x0.25
=0x0.25
=0
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