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二点5×4.8的简便运算3种答案一样

2.1乘12.5乘4.8,该怎么简便运算的

解: 4.8-4.8×0.5 =4.8×(1-0.5) =4.8×05 =2.4

12.5x4.8 =12.5x8x0.6 =100x0.6 =60

4.8×2.5 =1.2×4×2.5 =1.2×10 =12

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

5.2×0.9+0.9×4.8 解:运用乘法分配律 =(5.2+4.8)x0.9 =10x0.9 =9 祝学习进步。

😊

5.5×(9.8+1)

=4.8×0.37+ 5.2×0.37 =(4.8+5.2)X0.37 =10X0.37 =3.7 很高兴为你解答有用请采纳

原式=5.2+5×2.6-2.6×0.2 =5.2+13-0.52 =17.68 满意采纳奥

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