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72除4.8的简便计算???????

72/(2.4×2) =72/2.4/2 =30/2 =15

=72/2.4/2=30/2=15 或 =18/1.2=9/0.6=15

72/4.8 =72/12/0.4 =6/0.4 =15

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

(法一) 4.8/2.5/4 =4.8/(2.5*4) =4.8/10 =0.48 (法二) 4.8/2.5/4 =4.8/4/2.5 =1.2/2.5(同乘40,因为可以造成某数分之100的结果,在除法上只要考虑小数点的位置而已) =48/100 =0.48

4.8÷0.25 =(4.8×4)÷(0.25×4) =19.2÷1 =19.2

4.8÷1.5÷2 =4.8÷(1.5X2) =4.8÷3 =1.6

7.29+4.8÷2.5 =7.29+(4.8×4)÷(2.5×4) =7.29+19.2÷10 =7.29+1.92 =9.21 你好,本题已解答,如果满意 请点右下角“采纳答案”。

2.5×4.8 =2.5*4*1.2 =12 2.5×4.8 =4.8*2+4.8*0.5 =9.6+2.4 =12 满意采纳奥

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