56×4.1×125 简便计算
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56×4.1×125 简便计算
=7×8×4.1×1.25
=(7×4.1)×(8×1.25)
=28.7×10
=287
56×125×9
=7×(8×125)×9
=7×1000×9
=63000
56×4.1×125 简便计算
=7×8×4.1×1.25
=(7×4.1)×(8×1.25)
=28.7×10
=287
56×125×9
=7×(8×125)×9
=7×1000×9
=63000