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 |
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