题目内容
计算下列各题.
+
+
=
+
+
=
-
-
+
+
.
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 6 |
| 3 |
| 5 |
| 5 |
| 12 |
| 13 |
| 14 |
| 1 |
| 4 |
| 5 |
| 28 |
| 2 |
| 5 |
| 2 |
| 9 |
| 7 |
| 45 |
分析:(1)、(2)、(3)、(4)按照从左向右的顺序进行计算.
解答:解:
(1)
+
+
,
=
+
,
=
;
(2)
+
+
,
=
+
,
=
;
(3)
-
-
,
=
-
,
=
;
(4)
+
+
,
=
+
,
=
.
(1)
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 5 |
=
| 13 |
| 12 |
| 3 |
| 5 |
=
| 101 |
| 60 |
(2)
| 1 |
| 6 |
| 3 |
| 5 |
| 5 |
| 12 |
=
| 23 |
| 30 |
| 5 |
| 12 |
=
| 71 |
| 60 |
(3)
| 13 |
| 14 |
| 1 |
| 4 |
| 5 |
| 28 |
=
| 19 |
| 28 |
| 5 |
| 28 |
=
| 1 |
| 2 |
(4)
| 2 |
| 5 |
| 2 |
| 9 |
| 7 |
| 45 |
=
| 28 |
| 45 |
| 7 |
| 45 |
=
| 7 |
| 9 |
点评:考查了分数四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
练习册系列答案
相关题目