怎样简便就怎样算15÷3+45×1313÷49+13+1445-23)×2523-32×1021-2715÷[(23+15)×113]24×425[4-(34-38)]×42926×42517+78×57+3814+(1-12-14)-数学
2 |
3 |
25 |
2 |
=10-
25 |
3 |
=1
2 |
3 |
(4)3-
3 |
2 |
10 |
21 |
2 |
7 |
=3-
5 |
7 |
2 |
7 |
=3-(
5 |
7 |
2 |
7 |
=3-1,
=2,
(5)
1 |
5 |
2 |
3 |
1 |
5 |
1 |
13 |
=
1 |
5 |
13 |
15 |
1 |
13 |
=
1 |
5 |
1 |
15 |
=3,
(6)24×
4 |
25 |
=(25-1)×
4 |
25 |
=25×
4 |
25 |
4 |
25 |
=4-
4 |
25 |
=3
21 |
25 |
(7)【4-(
3 |
4 |
3 |
8 |
4 |
29 |
=【4-
3 |
8 |
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