题目内容
| 计算，我能行．（能简算的要简算） （
| （
|
| 1+
|
（1）（
+
）×40
=
×40+
×40
=30+16
=46；
（2）（
+
）÷
=（
+
）×
=
×
+
×
=1
+1
=2
；
（3）
×15+15×
=（
+
）×15
=1×15
=15；
（4）1+
÷
=1+
=1
．
| 3 |
| 4 |
| 2 |
| 5 |
=
| 3 |
| 4 |
| 2 |
| 5 |
=30+16
=46；
（2）（
| 7 |
| 8 |
| 13 |
| 18 |
| 13 |
| 18 |
=（
| 7 |
| 8 |
| 13 |
| 18 |
| 18 |
| 13 |
=
| 7 |
| 8 |
| 18 |
| 13 |
| 13 |
| 18 |
| 18 |
| 13 |
=1
| 11 |
| 52 |
=2
| 11 |
| 52 |
（3）
| 1 |
| 6 |
| 5 |
| 6 |
=（
| 1 |
| 6 |
| 5 |
| 6 |
=1×15
=15；
（4）1+
| 5 |
| 8 |
| 5 |
| 7 |
=1+
| 7 |
| 8 |
=1
| 7 |
| 8 |
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