511-(17-611)(74-56)÷112310+(47+12)×725〔12-(34-35)〕÷710.-数学
=1-
1 |
7 |
=
6 |
7 |
(2)(
7 |
4 |
5 |
6 |
1 |
12 |
=(
7 |
4 |
5 |
6 |
=
7 |
4 |
5 |
6 |
=21-10,
=11;
(3)
3 |
10 |
4 |
7 |
1 |
2 |
7 |
25 |
=
3 |
10 |
4 |
7 |
7 |
25 |
1 |
2 |
7 |
25 |
=
3 |
10 |
4 |
25 |
7 |
50 |
=
15 |
50 |
8 |
50 |
7 |
50 |
=
1 |
7 |
6 |
7 |
7 |
4 |
5 |
6 |
1 |
12 |
7 |
4 |
5 |
6 |
7 |
4 |
5 |
6 |
3 |
10 |
4 |
7 |
1 |
2 |
7 |
25 |
3 |
10 |
4 |
7 |
7 |
25 |
1 |
2 |
7 |
25 |
3 |
10 |
4 |
25 |
7 |
50 |
15 |
50 |
8 |
50 |
7 |
50 |