题目内容
下列各题怎样简算就怎样算．
×4×
×
+
×
×
+
×
+
（13+
）÷13．
| 2 |
| 5 |
| 3 |
| 4 |
| 5 |
| 6 |
| 5 |
| 9 |
| 5 |
| 9 |
| 1 |
| 6 |
| 37 |
| 5 |
| 1 |
| 4 |
| 1 |
| 4 |
| 13 |
| 5 |
| 1 |
| 4 |
（13+
| 13 |
| 15 |
（1）5×4×
=5×（4×
）
=5×3
=15；
（2）
×
+
×
=（
+
）×
=1×
=
；
（3）
×
+
×
+
=（
+
+1）×
=11×
=2
；
（4）（13+
）÷13
=13×
+
×
=1+
=1
．
| 3 |
| 4 |
=5×（4×
| 3 |
| 4 |
=5×3
=15；
（2）
| 5 |
| 6 |
| 5 |
| 9 |
| 5 |
| 9 |
| 1 |
| 6 |
=（
| 5 |
| 6 |
| 1 |
| 6 |
| 5 |
| 9 |
=1×
| 5 |
| 9 |
=
| 5 |
| 9 |
（3）
| 37 |
| 5 |
| 1 |
| 4 |
| 1 |
| 4 |
| 13 |
| 5 |
| 1 |
| 4 |
=（
| 37 |
| 5 |
| 13 |
| 5 |
| 1 |
| 4 |
=11×
| 1 |
| 4 |
=2
| 3 |
| 4 |
（4）（13+
| 13 |
| 15 |
=13×
| 1 |
| 13 |
| 13 |
| 15 |
| 1 |
| 13 |
=1+
| 1 |
| 15 |
=1
| 1 |
| 15 |
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