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9000➗72怎么用递等式巧算?

列式为: 5400➗72 =5400➗(9x8) =5400➗9➗8 =600➗8 =75

(9000—350)➗25 =9000➗25—350➗25 =360-14 =346

72➗4.8 =72➗(6×0.8) =72➗6➗0.8 =12➗0.8 =15

12.6x7.6x2.32➗1.9➗1.4➗2.9如何用简便计算? 12.6x7.6x2.32➗1.9➗1.4➗2.9 =(12.6÷4)*(7.6÷1.9)*(2.32÷2.9) =3.15*4*0.8 =10.08

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