题目内容
解方程或解比例.
①6×(x+2.1)=18;
②
=1.25;
③
=20:6.
①6×(x+2.1)=18;
②
| x |
| 4 |
③
| 6 |
| x |
①6×(x+2.1)=18
6x+12.6=18
6x+12.6-12.6=18-12.6
6x=5.4
6x÷6=5.4÷6
x=0.9
②
=1.25
×4=1.25×4
x=5
③
=20:6
20x=6×6
20x=36
x=1.8
6x+12.6=18
6x+12.6-12.6=18-12.6
6x=5.4
6x÷6=5.4÷6
x=0.9
②
| x |
| 4 |
| x |
| 4 |
x=5
③
| 6 |
| x |
20x=6×6
20x=36
x=1.8
练习册系列答案
相关题目