Question

3.72×6.23加上个62.3×0.628的简便运算？

Answer 1

把3.72×6.23转化成0.372×62.3，再用乘法分配律简算。
3.72×6.23+62.3×0.628
=0.372×62.3+62.3×0.628
=62.3×（0.372+0.628）
=62.3×1
=62.3

Answer 2

因为3.72×6.23=62.3×0.372，所以原式等于62.3×0.372+62.3×0.628，运用乘法分配律逆运算有62.3×（0.372+0.628）=62.3

Answer 3

3.72×6.23+62.3×0.628
=3.72×6.23+6.23×6.28
=6.23×（3.72+6.28）
=6.23×10
=62.3

Answer 4

把62.3×0.628变形成6.23×6.28
则原式=3.72×6.23+6.23×6.28
=6.23×(3.72+6.28)
=6.23×10
=62.3

Answer 5

这道题目要简算的话，其实可以先通过观察，大家都有一个6.23。那可以把前面的一个算式改成0.372×62.3这样再加上后面的算式，整个就可以提取公因式62.3题目就变成了62.3×（0.372+0.628）=62.3