1 |
7 |
=81.2-
11 |
7 |
3 |
7 |
=81.2-(
11 |
7 |
3 |
7 |
=81.2-2,
=79.2;
(2)
9 |
13 |
1 |
8 |
7 |
13 |
=
9 |
13 |
1 |
8 |
1 |
8 |
7 |
13 |
=(
9 |
13 |
7 |
13 |
1 |
8 |
=
16 |
13 |
1 |
8 |
=
2 |
13 |
(3)6696÷62-6.5×10.6,
=108-68.9,
=39.1;
(4)[
3 |
4 |
5 |
6 |
2 |
3 |
5 |
4 |
=[
3 |
4 |
1 |
6 |
5 |
4 |
=
7 |
12 |
4 |
5 |
=
7 |
15 |
1 |
7 |
9 |
13 |
1 |
8 |
7 |
13 |
3 |
4 |
5 |
6 |
2 |
3 |
5 |
4 |
1 |
7 |
11 |
7 |
3 |
7 |
11 |
7 |
3 |
7 |
9 |
13 |
1 |
8 |
7 |
13 |
9 |
13 |
1 |
8 |
1 |
8 |
7 |
13 |
9 |
13 |
7 |
13 |
1 |
8 |
16 |
13 |
1 |
8 |
2 |
13 |
3 |
4 |
5 |
6 |
2 |
3 |
5 |
4 |
3 |
4 |
1 |
6 |
5 |
4 |
7 |
12 |
4 |
5 |
7 |
15 |