Question

0.5+0.5×0.7-0.7的简便运算是什么？

Answer 1

巧算过程解析0.5+0.6×0.7-0.7
解题过程：
0.5+0.5×0.7-0.7
=0.5+0.35-0.7
=0.85-0.7
=0.15
存疑请追问，满意请采纳

Answer 2

观察题目，前两项有共同点，提取出0.5，则原式等于0.5*（1+0.7）-0.7＝0.5*1.7-0.7=0.85-0.7=0.15

Answer 3

0.5+0.5×0.7-0.7＝0.5+0.7×（0.5-1）＝0.5-0.7×0.5＝0.5×（1-0.7）＝0.5×0.3=0.15

Answer 4

0.5+0.7*(0.5-1)=0.5-0.7*0.5=0.5*(1-0.7)=0.5*0.3=0.15

Answer 5

把0.5分解成0.5×1 提取它们相同的公因数0.5
=0.5×（1+0.7）-0.7
=0.5×1.7-0.7=0.85-0.7=0.15