脱式计算(能简算的要简算).1512-4512-3384.63+5811+5.64+1311957-(2113+457+1113)1811-(711+38)79+310-29+17101511-38-58.-数学
3 |
11 |
=10.27+7,
=17.27;
(3)9
5 |
7 |
1 |
13 |
5 |
7 |
11 |
13 |
=(9
5 |
7 |
5 |
7 |
1 |
13 |
11 |
13 |
=5-2
12 |
13 |
=2
1 |
13 |
(4)
18 |
11 |
7 |
11 |
3 |
8 |
=
18 |
11 |
7 |
11 |
3 |
8 |
=1-
3 |
8 |
=
5 |
8 |
(5)
7 |
9 |
3 |
10 |
2 |
9 |
17 |
10 |
=(
7 |
9 |
2 |
9 |
3 |
10 |
17 |
10 |
=
5 |
9 |
=2
5 |
9 |
(6)
15 |
11 |
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