问题 解答题
解方程
x+56=102

x-970=270

x÷0.8=1.25
x÷5=0.1213x=2x÷0.8=1.25.
答案

(1)x+56=102,

x+56-56=102-56,

x=46;

(2)x-970=270,

x-970+970=270+970,

x=1240;

(3)x÷0.8=1.25,

x÷0.8×0.8=1.25×0.8,

x=1;

(4)x÷5=0.12,

x÷5×5=0.12×5,

x=0.6;

(5)13x=2,

13x÷13=2÷13,

x=

2
13

(6)x÷0.8=1.25,

x÷0.8×0.8=1.25×0.8,

x=1.

单项选择题
单项选择题