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7.2÷[1.8×(3.4%2.9)]怎样简算

7.2÷[1.8×(3.4-2.9)] =7.2÷[1.8×0.5] =7.2/0.9 =8

7.2÷[1.8×(3.4-2.9)] =7.2÷[1.8×0.5] =7.2÷1.8÷0.5 =4÷0.5 =8

8.1÷[1.8×(3.4-2.9)] =8.1÷(1.8x0.5) =8.1÷0.9 =9

7.2÷1.8×(3.4-2.9) =4×0.5 =2 你好,本题已解答,如果满意 请点右上角“采纳答案”。

将除号后半部分分解为3*9,5*5,3*8,2*11,与前半部分可同比消除,1可省略,最后剩下(4*2*7*2)=112口算即可得

9×(2.4÷4分之3-2分之1) =9×(1.8-0.5) =9×1.3 =11.7

6-1.8÷9/10÷4/5 =6-2÷4/5 =6-2.5 =3.5 2/5×0.125÷5/3÷1/8 =2/5×0.125×3/5×8 =(2/5×3/5×(0.125×8) =6/25×1 =6/25 [5/7÷(5/7×2/3)]÷6/7 =[5/7÷5/7÷2/3]÷6/7 =[1÷2/3]÷6/7 =3/2÷6/7 =7/4

1÷2×3÷3×4……÷8×9 =1÷2×9 =9/2

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