题目内容
脱式计算.
-
+
-(
-
)
+
-
.
| 4 |
| 5 |
| 3 |
| 8 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 4 |
| 3 |
| 8 |
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 6 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:(1)按照从左向右的顺序进行计算;
(2)先算小括号里面的减法,再算括号外面的减法;
(3)按照从左向右的顺序进行计算;
(2)先算小括号里面的减法,再算括号外面的减法;
(3)按照从左向右的顺序进行计算;
解答:
解:(1)
-
+
=
+
=
;
(2)
-(
-
)
=
-
=
;
(3)
+
-
=
-
=
.
| 4 |
| 5 |
| 3 |
| 8 |
| 2 |
| 3 |
=
| 17 |
| 40 |
| 2 |
| 3 |
=
| 131 |
| 120 |
(2)
| 2 |
| 3 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 3 |
| 8 |
=
| 7 |
| 24 |
(3)
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 6 |
=
| 5 |
| 8 |
| 1 |
| 6 |
=
| 11 |
| 24 |
点评:考查了四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
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