题目内容
解方程:
x÷
=40;
y-60%y=20;
+
m=
.
x÷
| 3 |
| 4 |
y-60%y=20;
| 3 |
| 8 |
| 3 |
| 8 |
| 5 |
| 8 |
(1)x÷
=40,
x÷
×
=40×
,
x=30;
(2)y-60%y=20,
(1-60%)y=20,
40%y=20,
0.4y÷0.4=20÷0.4,
y=50;
(3)
+
m=
,
+
m-
=
-
,
m=
,
m×
=
×
,
m=
.
| 3 |
| 4 |
x÷
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=30;
(2)y-60%y=20,
(1-60%)y=20,
40%y=20,
0.4y÷0.4=20÷0.4,
y=50;
(3)
| 3 |
| 8 |
| 3 |
| 8 |
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
| 3 |
| 8 |
| 8 |
| 3 |
| 1 |
| 4 |
| 8 |
| 3 |
m=
| 2 |
| 3 |
练习册系列答案
相关题目