题目内容
列式计算
(1)从
里减去
与
的差,结果是多少?
(2)X与
的和等于
,求X.
(1)从
| 5 |
| 9 |
| 5 |
| 9 |
| 1 |
| 3 |
(2)X与
| 1 |
| 7 |
| 13 |
| 21 |
(1)
-(
-
)
=
-
+
,
=
;
答:结果是
.
(2)X与
的和等于
,则得方程:
x+
=
.
x=
.
答:x是
.
| 5 |
| 9 |
| 5 |
| 9 |
| 1 |
| 3 |
=
| 5 |
| 9 |
| 5 |
| 9 |
| 1 |
| 3 |
=
| 1 |
| 3 |
答:结果是
| 1 |
| 3 |
(2)X与
| 1 |
| 7 |
| 13 |
| 21 |
x+
| 1 |
| 7 |
| 13 |
| 21 |
x=
| 10 |
| 21 |
答:x是
| 10 |
| 21 |
练习册系列答案
相关题目