题目内容
解方程.
| X+2.6=6.5 | 9y-6.3=8.1 | 4.5X+X=11. |
(1)X+2.6=6.5,
X+2.6-2.6=6.5-2.6,
x=3.9;
(2)9y-6.3=8.1,
9y-6.3+6.3=8.1+6.3,
9y=14.4,
9y÷9=14.4÷9,
y=1.6;
(3)4.5X+X=11,
5.5x=11,
5.5x÷5.5=11÷5.5,
x=2.
X+2.6-2.6=6.5-2.6,
x=3.9;
(2)9y-6.3=8.1,
9y-6.3+6.3=8.1+6.3,
9y=14.4,
9y÷9=14.4÷9,
y=1.6;
(3)4.5X+X=11,
5.5x=11,
5.5x÷5.5=11÷5.5,
x=2.
练习册系列答案
相关题目