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72除4.8的简便计算???????

=72/2.4/2=30/2=15 或 =18/1.2=9/0.6=15

72/(2.4×2) =72/2.4/2 =30/2 =15

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

解: 72/4.8 =720/48 =90/6 =15 72/4.8 =2.4x30 / 2.4x2 =30/2 =15 72/4.8 =9/0.6 =15 不知道算不算简便方法??

(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

简便计算: 4.872(15*2.4) =4.872x36 =175.392

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”。

25x(4+0.8)=25x4+25x0.8=100+20=120 25x4x1.2=100x1.2=120 5x4x5x1.2=20x6=120 25x(4+4x0.2)=25x4+25x4x0.2=100+100x0.2=100+20=120

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