百分数方程和计算.
一、解方程
X÷70%=100
2/3X+75%=34
60%X+70%X=1.69
(70+X)%=1.4
3/4-25%X=20
X-30%X=7
18%X-12.5%X=5.5
(1+35%)X=270%
15-10%X=1
50×18%-1.8X=7.2二、脱式计算
32%×76.4+23.6×0.32
2+87.5%-(1+7.5%)
30.09+3.15-315%
35.5+(2.8-0.8)÷80%