1/4×0.75+0.25×3/8+25%×1/8

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1/4×0.75+0.25×3/8+25%×1/8

1/4×0.75+0.25×3/8+25%×1/8
1/4×0.75+0.25×3/8+25%×1/8

1/4×0.75+0.25×3/8+25%×1/8
原式=1/4×0.75+(0.25×3/8+0.25×1/8)
=1/4×0.75+0.25×(3/8+1/8)
=1/4×3/4+1/4×1/2
=1/4×(3/4+2/4)
=1/4×5/4=5/16