题目内容
| 用简便方法计算． 17×
| (
| ||||||||||||
|
|
（1）17×
=（16+1）×
=16×
+1×
=9+
=9
；
（2）(
+
)×32
=
×32+
×32
=24+20
=44；
（3）
×
+
×
=
×（
+
）
=
×1
=
；
（4）
×
×16
=
×（
×16）
=
×2
=
．
| 9 |
| 16 |
=（16+1）×
| 9 |
| 16 |
=16×
| 9 |
| 16 |
| 9 |
| 16 |
=9+
| 9 |
| 16 |
=9
| 9 |
| 16 |
（2）(
| 3 |
| 4 |
| 5 |
| 8 |
=
| 3 |
| 4 |
| 5 |
| 8 |
=24+20
=44；
（3）
| 5 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
| 1 |
| 4 |
=
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 4 |
=
| 5 |
| 9 |
=
| 5 |
| 9 |
（4）
| 5 |
| 4 |
| 1 |
| 8 |
=
| 5 |
| 4 |
| 1 |
| 8 |
=
| 5 |
| 4 |
=
| 5 |
| 2 |
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