1.25×4.8×0.15 巧算

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1.25×4.8×0.15 巧算

1.25×4.8×0.15 巧算
1.25×4.8×0.15 巧算

1.25×4.8×0.15 巧算
1.25×4.8×0.15
=1.25×0.8x6×0.15
=1x0.9
=0.9

=1.25×(4+0.8)×0.15
=1.25×4×0.15+1.25×0.8×0.15
=5×0.15+1×0.15
=0.75+0.15
=0.9