题目内容
递等式计算.
-
-
+
-
1-
-
-
+
+
+
-
-
-(0.5-
)
| 8 |
| 9 |
| 1 |
| 12 |
| 5 |
| 18 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 10 |
1-
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 4 |
| 1 |
| 12 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 8 |
| 9 |
| 1 |
| 6 |
| 5 |
| 12 |
| 3 |
| 4 |
| 1 |
| 3 |
分析:第3题根据减法的性质运算,第4题根据加法的交换律和结合律运算,第6题根据减法的性质运算,其它题根据分数的加减法法则运算.
解答:解:
-
-
,
=
-
-
,
=
,
+
-
,
=
+
-
,
=
,
1-
-
-
,
=1-(
+
+
),
=1-
,
=
,
+
+
+
,
=
+
+
+
,
=
+
,
=
,
-
-
,
=
-
-
,
=
,
-(0.5-
),
=
-
+
,
=
.
| 8 |
| 9 |
| 1 |
| 12 |
| 5 |
| 18 |
=
| 32 |
| 36 |
| 3 |
| 36 |
| 10 |
| 36 |
=
| 19 |
| 36 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 10 |
=
| 10 |
| 20 |
| 15 |
| 20 |
| 6 |
| 20 |
=
| 19 |
| 20 |
1-
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 4 |
=1-(
| 5 |
| 40 |
| 4 |
| 40 |
| 10 |
| 40 |
=1-
| 19 |
| 40 |
=
| 21 |
| 40 |
| 1 |
| 12 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
=
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 6 |
| 1 |
| 20 |
=
| 20 |
| 60 |
| 3 |
| 60 |
=
| 23 |
| 60 |
| 8 |
| 9 |
| 1 |
| 6 |
| 5 |
| 12 |
=
| 32 |
| 36 |
| 6 |
| 36 |
| 15 |
| 36 |
=
| 11 |
| 36 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 7 |
| 12 |
点评:此题主要考查分数的加减法运算法则和运用运算定律进行简便运算的知识.
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