题目内容
下面的计算对吗?并把错的改正过来.
|
|
(1)计算错误,应为:
-
-
=
-(
+
)
=
-
=
;
(2)计算正确过于繁琐,应为:
+
+
=1+
=1
.
| 5 |
| 9 |
| 5 |
| 12 |
| 1 |
| 12 |
=
| 5 |
| 9 |
| 5 |
| 12 |
| 1 |
| 12 |
=
| 5 |
| 9 |
| 1 |
| 2 |
=
| 1 |
| 18 |
(2)计算正确过于繁琐,应为:
| 5 |
| 14 |
| 9 |
| 14 |
| 7 |
| 8 |
=1+
| 7 |
| 8 |
=1
| 7 |
| 8 |
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