250×36×24
=125×2×36×3×8
=125×8×6×36
=1000×216
=216000
250×36×24
=250×4×36×6
=1000×216
=216000
解哪拍知亮，李猛羡250x36×24
=250x(4x9)x24
=250x4x[(10-1)x24]
=1000x(10x24-24)
=1000x(240-24)
=1000x216
=216000
250x24Ⅹ40-250x24÷4
=6000Ⅹ40-6000÷4
=240000-1500
=238500
＝250×4×9×24＝1000×216＝216000
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