题目内容
解方程.
| 9.5x-5.3x=12.6 | 5x-4.2=8.8 | 18x÷(45-9)=4 | 6x+5×4.4=40. |
①9.5x-5.3x=12.6,
x(9.5-5.3)=12.6,
4.2x=12.6,
4.2x÷4.2=12.6÷4.2,
x=3;
②5x-4.2=8.8,
5x-4.2+4.2=8.8+4.2,
5x=13,
5x÷5=13÷5,
x=2.6;
③18x÷(45-9)=4,
18x÷36=4,
18x÷36×36=4×36,
18x=144,
18x÷18=144÷18,
x=8;
④6x+5×4.4=40,
6x+22=40,
6x+22-22=40-22,
6x=18,
6x÷6=18÷6,
x=3.
x(9.5-5.3)=12.6,
4.2x=12.6,
4.2x÷4.2=12.6÷4.2,
x=3;
②5x-4.2=8.8,
5x-4.2+4.2=8.8+4.2,
5x=13,
5x÷5=13÷5,
x=2.6;
③18x÷(45-9)=4,
18x÷36=4,
18x÷36×36=4×36,
18x=144,
18x÷18=144÷18,
x=8;
④6x+5×4.4=40,
6x+22=40,
6x+22-22=40-22,
6x=18,
6x÷6=18÷6,
x=3.
练习册系列答案
相关题目