题目内容
计算(结果写成最简分数,若是假分数,请化成带分数):
(1)
+
=
(2)9-4
=
(3)2
×9=
(4)
÷
=
(5)
+
-
=
(6)10÷(
+
)=
(1)
| 5 |
| 6 |
| 1 |
| 3 |
(2)9-4
| 1 |
| 5 |
(3)2
| 4 |
| 9 |
(4)
| 14 |
| 15 |
| 10 |
| 7 |
(5)
| 1 |
| 12 |
| 3 |
| 4 |
| 2 |
| 3 |
(6)10÷(
| 1 |
| 2 |
| 1 |
| 5 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:根据分数四则混合运算的顺序,按照分数加、减、乘、除法的计算法则进行简算即可.
解答:
解:(1)
+
=
+
=1
;
(2)9-4
=8
-4
=4
;
(3)2
×9
=2×9+
×9
=18+4
=22;
(4)
÷
=
×
=
;
(5)
+
-
=
+
-
=
=
;
(6)10÷(
+
)
=10÷(
+
)
=10÷
=10×
=14
.
| 5 |
| 6 |
| 1 |
| 3 |
=
| 5 |
| 6 |
| 2 |
| 6 |
=1
| 1 |
| 6 |
(2)9-4
| 1 |
| 5 |
=8
| 5 |
| 5 |
| 1 |
| 5 |
=4
| 4 |
| 5 |
(3)2
| 4 |
| 9 |
=2×9+
| 4 |
| 9 |
=18+4
=22;
(4)
| 14 |
| 15 |
| 10 |
| 7 |
=
| 14 |
| 15 |
| 7 |
| 10 |
=
| 49 |
| 75 |
(5)
| 1 |
| 12 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 12 |
| 9 |
| 12 |
| 8 |
| 12 |
=
| 2 |
| 12 |
=
| 1 |
| 6 |
(6)10÷(
| 1 |
| 2 |
| 1 |
| 5 |
=10÷(
| 5 |
| 10 |
| 2 |
| 10 |
=10÷
| 7 |
| 10 |
=10×
| 10 |
| 7 |
=14
| 2 |
| 7 |
点评:此题考查的目的是理解掌握分数四则混合运算的顺序以及它们的计算法则,并且能够正确熟练地进行计算.
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