题目内容
计算下面各题.
|
| 7-
| ||||||||||||||||
|
| 6-(
|
考点:分数的加法和减法
专题:文字叙述题
分析:(1)按照从左向右的顺序进行计算;
(2)按照从左向右的顺序进行计算;
(3)根据分数减法的计算方法进行计算;
(4)先算减法,再算加法;
(5)先算加法,再算减法;
(6)先算小括号里面的减法,再算括号外面的减法.
(2)按照从左向右的顺序进行计算;
(3)根据分数减法的计算方法进行计算;
(4)先算减法,再算加法;
(5)先算加法,再算减法;
(6)先算小括号里面的减法,再算括号外面的减法.
解答:
解:(1)
-
+
=
+
=
;
(2)
+
-
=
-
=
;
(3)7-
=6
;
(4)
+(
-
)
=
+
=
;
(5)
-(
+
)
=
-
=
;
(6)6-(
-
)
=6-
=5
.
| 1 |
| 3 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 1 |
| 12 |
| 5 |
| 6 |
=
| 11 |
| 12 |
(2)
| 4 |
| 15 |
| 7 |
| 15 |
| 1 |
| 5 |
=
| 11 |
| 15 |
| 1 |
| 5 |
=
| 8 |
| 15 |
(3)7-
| 5 |
| 7 |
| 2 |
| 7 |
(4)
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 5 |
| 9 |
| 1 |
| 4 |
=
| 29 |
| 36 |
(5)
| 3 |
| 5 |
| 2 |
| 15 |
| 1 |
| 3 |
=
| 3 |
| 5 |
| 7 |
| 15 |
=
| 2 |
| 15 |
(6)6-(
| 3 |
| 4 |
| 2 |
| 5 |
=6-
| 7 |
| 20 |
=5
| 13 |
| 20 |
点评:考查了分数加减法的混合运算,注意运算顺序和运算法则,然后再进一步计算.
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