题目内容
下面各题怎样算简便就怎样算.
| 44×
|
|
(1)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)44×
,
=(43+1)×
,
=43×
+1×
,
=5+
,
=5
;
(3)
÷
×
,
=
×
×
,
=
.
| 1 |
| 5 |
| 4 |
| 9 |
| 1 |
| 5 |
| 5 |
| 9 |
=(
| 4 |
| 9 |
| 5 |
| 9 |
| 1 |
| 5 |
=1×
| 1 |
| 5 |
=
| 1 |
| 5 |
(2)44×
| 5 |
| 43 |
=(43+1)×
| 5 |
| 43 |
=43×
| 5 |
| 43 |
| 5 |
| 43 |
=5+
| 5 |
| 43 |
=5
| 5 |
| 43 |
(3)
| 5 |
| 18 |
| 3 |
| 4 |
| 9 |
| 10 |
=
| 5 |
| 18 |
| 4 |
| 3 |
| 9 |
| 10 |
=
| 1 |
| 3 |
练习册系列答案
相关题目