题目内容
用你喜欢的方法计算:
|
4-
| ||||||||||||
[2-(
|
14×(
|
分析:①④运用乘法的分配律进行计算即可.
②运用减法的性质进行解答即可.
③根据四则混合运算的运算顺序计算即可.
②运用减法的性质进行解答即可.
③根据四则混合运算的运算顺序计算即可.
解答:解:
①
÷9+
×
=
×
+
×
=
×(
+
)
=
×1
=
;
②4-
-
=4-(
+
)
=4-1
=3;
③[2-(
+
)]÷
=[2-
]×
=
×
=1
;
④14×(
+
)÷
=(14×
+14×
)×
=15×
=10.
①
| 7 |
| 10 |
| 3 |
| 10 |
| 1 |
| 9 |
=
| 7 |
| 10 |
| 1 |
| 9 |
| 3 |
| 10 |
| 1 |
| 9 |
=
| 1 |
| 9 |
| 7 |
| 10 |
| 3 |
| 10 |
=
| 1 |
| 9 |
=
| 1 |
| 9 |
②4-
| 7 |
| 15 |
| 8 |
| 15 |
=4-(
| 7 |
| 15 |
| 8 |
| 15 |
=4-1
=3;
③[2-(
| 3 |
| 4 |
| 1 |
| 3 |
| 2 |
| 3 |
=[2-
| 13 |
| 12 |
| 3 |
| 2 |
=
| 11 |
| 12 |
| 3 |
| 2 |
=1
| 3 |
| 8 |
④14×(
| 4 |
| 7 |
| 1 |
| 2 |
| 3 |
| 2 |
=(14×
| 4 |
| 7 |
| 1 |
| 2 |
| 2 |
| 3 |
=15×
| 2 |
| 3 |
=10.
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