题目内容
计算:(170+
)×
+
.
| 1 |
| 12 |
| 1 |
| 13 |
| 11 |
| 12 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:根据乘法分配律和加法结合律进行简算.
解答:
解:(170+
)×
+
=170×
+
×
+
=13
+
×
+
=(13+
)+
×
+
=13+
×(1+
)+
=13+
×
+
=13+
+
=13+(
+
)
=13+1
=14.
| 1 |
| 12 |
| 1 |
| 13 |
| 11 |
| 12 |
=170×
| 1 |
| 13 |
| 1 |
| 12 |
| 1 |
| 13 |
| 11 |
| 12 |
=13
| 1 |
| 13 |
| 1 |
| 12 |
| 1 |
| 13 |
| 11 |
| 12 |
=(13+
| 1 |
| 13 |
| 1 |
| 12 |
| 1 |
| 13 |
| 11 |
| 12 |
=13+
| 1 |
| 13 |
| 1 |
| 12 |
| 11 |
| 12 |
=13+
| 1 |
| 13 |
| 13 |
| 12 |
| 11 |
| 12 |
=13+
| 1 |
| 12 |
| 11 |
| 12 |
=13+(
| 1 |
| 12 |
| 11 |
| 12 |
=13+1
=14.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
练习册系列答案
相关题目