1.25x15x18的简算方法

2025-04-15 15:09:31
推荐回答(1个)
回答1:

1.25x15x18
=1.25x15x(16+2)
=1.25x15x16+1.25x15x2
=15x1.25x8x2+1.25x30
=15x10x2+37.5
=300+37.5
=337.5
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