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97➗8=的竖式计算

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

125x198➗(18➗8)的简便运算 125x198➗(18➗8) =125x198➗(18/8) =125x198x8/18 =125x8x198/18 =1000x198/18 =1000x11 =11000

8.75➗2.5*8.75➗2.5用简便方法 8.75➗2.5*8.75➗2.5 =3.5*3.5 =12.25 直接计算 没有简算

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

列式为: 125➗(5➗8) =125➗5x8 =125x8➗5 =1000➗5 =200

360➗45 =360➗(9×5) =360➗9➗5 =40➗5 =8 8100➗45 =8100➗(9×5) =8100➗9➗5 =900➗5 =180

640➗4 依次用6➗4=1余2 用24➗4=6 所以640➗4=160

乙的效率:4/5÷8=1/10 1÷(1/8+1/10) =1÷9/40 =1×40/9 =40/9(天)

你好,正确的答案是: 5*1➗8=5/8 5/8➗6/10 =5/8*10/6 =25/24

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