题目内容
| 计算下面各题,能简算的要简算. 0.125+(
|
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1-
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|
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考点:分数的加法和减法
专题:运算顺序及法则
分析:(1)利用加法交换律简算;
(2)按照从左到右的顺序计算;
(3)(4)先约分,再加减;
(5)利用减法的性质简算;
(6)利用加法交换律与减法的性质简算.
(2)按照从左到右的顺序计算;
(3)(4)先约分,再加减;
(5)利用减法的性质简算;
(6)利用加法交换律与减法的性质简算.
解答:
解:0.125+(
+
)
=0.125+
+
=1
;
-
+1
=
+1
=1
;
1-
+
=
+
=
;
+2+
=
+2+
=3;
-(
-
)
=
-
+
=
;
-
+
-
=
+
-(
+
)
=1-1
=0.
| 1 |
| 4 |
| 7 |
| 8 |
=0.125+
| 7 |
| 8 |
| 1 |
| 4 |
=1
| 1 |
| 4 |
| 5 |
| 13 |
| 2 |
| 13 |
=
| 3 |
| 13 |
=1
| 3 |
| 13 |
1-
| 1 |
| 4 |
| 6 |
| 8 |
=
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 2 |
| 8 |
| 24 |
| 2 |
| 3 |
=
| 1 |
| 3 |
| 2 |
| 3 |
=3;
| 3 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
=
| 3 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
=
| 1 |
| 2 |
| 4 |
| 15 |
| 1 |
| 9 |
| 11 |
| 15 |
| 8 |
| 9 |
=
| 4 |
| 15 |
| 11 |
| 15 |
| 8 |
| 9 |
| 1 |
| 9 |
=1-1
=0.
点评:此题考查分数的连加和加减混合运算,注意数字特点,灵活选用适当的方法和运算定律简算.
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