题目内容
计算(能简便的用简便方法计算).
-
+
10-
-
-(
+
)
+
+
.
| 8 |
| 9 |
| 1 |
| 4 |
| 5 |
| 8 |
10-
| 7 |
| 18 |
| 11 |
| 18 |
| 7 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 5 |
| 3 |
| 10 |
| 2 |
| 15 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:(1)依据分数加减法计算方法,按照从左到右顺序计算解答,
(2)运用除法性质解答,
(3)按照先算括号里面的,再算括号外面的顺序计算解答,
(4)按照从左到右顺序计算解答.
(2)运用除法性质解答,
(3)按照先算括号里面的,再算括号外面的顺序计算解答,
(4)按照从左到右顺序计算解答.
解答:
解:(1)
-
+
=
+
=1
;
(2)10-
-
=10-(
+
)
=10-1
=9;
(3)
-(
+
)
=
-
=0;
(4)
+
+
=
+
=
.
| 8 |
| 9 |
| 1 |
| 4 |
| 5 |
| 8 |
=
| 23 |
| 36 |
| 5 |
| 8 |
=1
| 19 |
| 72 |
(2)10-
| 7 |
| 18 |
| 11 |
| 18 |
=10-(
| 7 |
| 18 |
| 11 |
| 18 |
=10-1
=9;
(3)
| 7 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
=
| 7 |
| 12 |
| 7 |
| 12 |
=0;
(4)
| 1 |
| 5 |
| 3 |
| 10 |
| 2 |
| 15 |
=
| 1 |
| 2 |
| 2 |
| 15 |
=
| 19 |
| 30 |
点评:本题考查知识点:(1)依据四则运算计算方法正确进行计算,(2)正确运用减法性质解决问题.
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