您现在的位置是:首页 > 学科知识查询 > 小学数学题库

解方程: x+3.2=10.83 x÷13=20 9x-36=5x 2.5×3-2x=0.5 4(2-x)=1 x÷1.7-0.8=6.

编辑:chaxungu时间:2026-04-27 13:37:43分类:小学数学题库

解方程:
x+3.2=10.83x÷13=209x-36=5x
2.5×3-2x=0.54(2-x)=1x÷1.7-0.8=6.
(1)x+3.2=10.83,
x+3.2-3.2=10.83-3.2,
x=7.63;

(2)x÷13=20,
x÷13×13=20×13,
x=260;

(3)9x-36-5x=5x-5x,
4x-36=0,
4x-36+36=0+36,
4x=36,
4x÷4=36÷4,
x=9;

(4)2.5×3-2x=0.5,
7.5-2x=0.5,
7.5-2x+2x=0.5+2x,
0.5+2x=7.5,
0.5+2x-0.5=7.5-0.5,
2x=7,
2x÷2=7÷2,
x=3.5;

(5)4(2-x)=1,
8-4x=1,
8-4x+4x=1+4x,
1+4x=8,
1+4x-1=8-1,
4x=7,
4x÷4=7÷4,
x=
7
4


(6)x÷1.7-0.8=6,
x÷1.7-0.8+0.8=6+0.8,
x÷1.7=6.8,
x÷1.7×1.7=6.8×1.7,
x=11.56.