3/8×0、75 1/4×5/8-1/4的简便计算

3/8×0、75 1/4×5/8-1/4的简便计算

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3/8×0.75+1/凳孝搜4×5/8-1/4

=3/8×3/4+1/4×(-1+5/8)
=3/枣历8×3/4-1/4×3/8
=3/慎汪8×(3/4-1/4)
=3/8×1/2
=3/16

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