题目内容
“计算”空间站
+
=
=
+
=
=( )
+
-
-
+
+
-
-(
-
)
-(
+
)
+
-
.
| 4 |
| 13 |
| 8 |
| 13 |
| ( )+( ) |
| 13 |
| ( ) |
| 13 |
| 5 |
| 8 |
| 7 |
| 8 |
| ( )+( ) |
| 8 |
| ( ) |
| ( ) |
| 1 |
| 9 |
| 3 |
| 6 |
| 1 |
| 3 |
| 5 |
| 6 |
| 1 |
| 3 |
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 8 |
| 5 |
| 6 |
| 1 |
| 3 |
| 3 |
| 10 |
| 5 |
| 12 |
| 7 |
| 36 |
| 1 |
| 9 |
分析:(1)、(2)根据同分母分数加减法的计算方法进行计算;
(3)、(4)、(5)、(8)按照从左向右的顺序进行计算;
(6)、(7)先算括号里面的,再算括号外面的.
(3)、(4)、(5)、(8)按照从左向右的顺序进行计算;
(6)、(7)先算括号里面的,再算括号外面的.
解答:解:(1)
+
=
=
;
(2)
+
=
=
=1
;
(3)
+
-
=
-
=
;
(4)
-
+
=
+
=
;
(5)
+
-
=
-
=
;
(6)
-(
-
)
=
-
=
;
(7)
-(
+
)
=
-
=
;
(8)
+
-
=
-
=
.
| 4 |
| 13 |
| 8 |
| 13 |
=
| 4+8 |
| 13 |
=
| 12 |
| 13 |
(2)
| 5 |
| 8 |
| 7 |
| 8 |
=
| 5+7 |
| 8 |
=
| 3 |
| 2 |
=1
| 1 |
| 2 |
(3)
| 1 |
| 9 |
| 3 |
| 6 |
| 1 |
| 3 |
=
| 11 |
| 18 |
| 1 |
| 3 |
=
| 5 |
| 18 |
(4)
| 5 |
| 6 |
| 1 |
| 3 |
| 2 |
| 3 |
=
| 1 |
| 2 |
| 2 |
| 3 |
=
| 7 |
| 6 |
(5)
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 3 |
=
| 9 |
| 8 |
| 1 |
| 3 |
=
| 19 |
| 24 |
(6)
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 1 |
| 2 |
| 3 |
| 8 |
=
| 1 |
| 8 |
(7)
| 5 |
| 6 |
| 1 |
| 3 |
| 3 |
| 10 |
=
| 5 |
| 6 |
| 19 |
| 30 |
=
| 1 |
| 5 |
(8)
| 5 |
| 12 |
| 7 |
| 36 |
| 1 |
| 9 |
=
| 11 |
| 18 |
| 1 |
| 9 |
=
| 1 |
| 2 |
点评:考查了分数加减法的计算,注意运算顺序,然后再计算.
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