题目内容
计算,写出主要过程,能简算的要简算.
|
(3-
|
6-
| ||||||||||||||||||||
|
|
[(2-
|
分析:①②③④⑥按照四则混合运算的顺序进行计算即可.
⑤运用分数除法的计算法则进行计算即可.
⑤运用分数除法的计算法则进行计算即可.
解答:解:①
+
÷
×
=
+
×
×
=
+
×
=
+
=1;
②(3-
)×
-
=
×
-
=
-
=0;
③6-
÷
-
=6-
×
-
=6-
-
=5
;
④
÷
+
×
=
×
+
×
=
×(
+3)
=
×
=1
;
⑤
÷
÷6
=
×
×
=
;
⑥[(2-
)÷
]×
=[
×
]×
=
×
=1
.
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 9 |
| 2 |
| 27 |
=
| 3 |
| 4 |
| 3 |
| 4 |
| 9 |
| 2 |
| 2 |
| 27 |
=
| 3 |
| 4 |
| 27 |
| 8 |
| 2 |
| 27 |
=
| 3 |
| 4 |
| 1 |
| 4 |
=1;
②(3-
| 5 |
| 12 |
| 3 |
| 31 |
| 1 |
| 4 |
=
| 31 |
| 12 |
| 3 |
| 31 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 4 |
=0;
③6-
| 3 |
| 8 |
| 27 |
| 4 |
| 7 |
| 18 |
=6-
| 3 |
| 8 |
| 4 |
| 27 |
| 7 |
| 18 |
=6-
| 1 |
| 18 |
| 7 |
| 18 |
=5
| 5 |
| 9 |
④
| 3 |
| 7 |
| 15 |
| 4 |
| 3 |
| 4 |
| 12 |
| 7 |
=
| 3 |
| 7 |
| 4 |
| 15 |
| 3 |
| 4 |
| 12 |
| 7 |
=
| 3 |
| 7 |
| 4 |
| 15 |
=
| 3 |
| 7 |
| 49 |
| 15 |
=1
| 2 |
| 5 |
⑤
| 9 |
| 48 |
| 3 |
| 4 |
=
| 9 |
| 48 |
| 4 |
| 3 |
| 1 |
| 6 |
=
| 1 |
| 24 |
⑥[(2-
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
=[
| 7 |
| 4 |
| 4 |
| 3 |
| 3 |
| 4 |
=
| 7 |
| 3 |
| 3 |
| 4 |
=1
| 3 |
| 4 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
练习册系列答案
相关题目