3 |
7 |
1 |
4 |
13 |
28 |
=
19 |
28 |
13 |
28 |
=
3 |
14 |
(2)
4 |
5 |
7 |
12 |
1 |
5 |
=(
4 |
5 |
1 |
5 |
7 |
12 |
=1+
7 |
12 |
=1
7 |
12 |
(3)5-
5 |
17 |
12 |
7 |
=4
12 |
17 |
12 |
7 |
=2
118 |
119 |
(4)
4 |
5 |
1 |
6 |
3 |
10 |
=
4 |
5 |
7 |
15 |
=
1 |
3 |
計(jì)算下面各題,能簡(jiǎn)便計(jì)算的要簡(jiǎn)便計(jì)算
|
| ||||||||||||
5-
|
|
3 |
7 |
1 |
4 |
13 |
28 |
19 |
28 |
13 |
28 |
3 |
14 |
4 |
5 |
7 |
12 |
1 |
5 |
4 |
5 |
1 |
5 |
7 |
12 |
7 |
12 |
7 |
12 |
5 |
17 |
12 |
7 |
12 |
17 |
12 |
7 |
118 |
119 |
4 |
5 |
1 |
6 |
3 |
10 |
4 |
5 |
7 |
15 |
1 |
3 |