0.52×43+1.04+47×0.8,简便运算怎么算？

2024-12-02 20:16:14

推荐回答（2个）

回答1：

0.52×43+1.04+47×0.8
＝0.52×43+0.52×2+47×0.8
＝0.52×（43+2）+47×0.8
＝0.52×45+47×0.8
＝0.52×45+（45+2）×0.8
＝0.52×45+0.8×45+2×0.8
＝45×（0.52+0.8）+1.6
＝45×1.32+1.6
＝45×4×0.33+1.6
＝180×0.33+1.6
＝180×0.3×1.1+1.6
＝54×1.1+1.6
＝54×（1+0.1）+1.6
＝54+5.4+1.6
＝54+（5.4+1.6）
＝54+7
＝61

回答2：

0.52×43+1.04+47×0.8
=0.52×43+0.52x2+47×0.8
=0.52x（43+2）+47x0.8
=0.52x45+47x0.8
=23.4+37.6
=60