题目内容
计算下面各题.
-
+
4-
-
-(
-
)
| 5 |
| 9 |
| 1 |
| 3 |
| 5 |
| 6 |
4-
| 3 |
| 4 |
| 4 |
| 7 |
| 6 |
| 7 |
| 11 |
| 14 |
| 1 |
| 2 |
分析:本题根据分数加法、减法的计算法则及四则混合运算的运算顺序计算即可.
解答:解:
-
+
,
=
-
+
,
=
;
4-
-
=4-
-
,
=4-(
+
),
=4-1
,
=2
;
-(
-
)
=
-(
-
),
=
-
,
=
.
| 5 |
| 9 |
| 1 |
| 3 |
| 5 |
| 6 |
=
| 10 |
| 18 |
| 6 |
| 18 |
| 15 |
| 18 |
=
| 19 |
| 18 |
4-
| 3 |
| 4 |
| 4 |
| 7 |
=4-
| 21 |
| 28 |
| 16 |
| 28 |
=4-(
| 21 |
| 28 |
| 16 |
| 28 |
=4-1
| 9 |
| 28 |
=2
| 19 |
| 28 |
| 6 |
| 7 |
| 11 |
| 14 |
| 1 |
| 2 |
=
| 6 |
| 7 |
| 11 |
| 14 |
| 7 |
| 14 |
=
| 6 |
| 7 |
| 2 |
| 7 |
=
| 4 |
| 7 |
点评:完成有关于分数四则混合运算题目要细心,注意通分约分.
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