Question

5.42*2.3+0.542*23简便方法怎么做？

Answer 1

5.42×2.3+0.542×23=5.42×2.3+5.42×2.3=5.42×(2.3+2.3)=5.42×(5-0.4)=5.42×5-5.42×0.4=27.1-2.168=24.932。先将小数点移到相同位置，然后用乘法分配率及其逆运算进行简便计算，得到结果为24.932。

Answer 2

因为5.42×2.3＝0.542×23，所以原式等于 0.542×（23+23）＝0.542×46＝24.932

Answer 3

5.42×2.3+0.542×23＝0.542×23+0.542×23＝23×（0.542+0.542）＝23×1.084＝24.932

Answer 4

5.42×2.3+0.542×23
＝0.542×23+0.542×23
＝23×（0.542+0.542）
＝23×1.084
＝24.932