用合理的方法计算:(1)23+13×34(2)20052006×2007(3)(58+127)×8+1927(4)35×(17+821÷23)(5)16÷[1÷(35-310)].-数学
=
2005 |
2006 |
=
2005 |
2006 |
2005 |
2006 |
=2005+
2005 |
2006 |
=2005
2005 |
2006 |
(3)(
5 |
8 |
1 |
27 |
19 |
27 |
=
5 |
8 |
1 |
27 |
19 |
27 |
=5+(
8 |
27 |
19 |
27 |
=5+1,
=6;
(4)
3 |
5 |
1 |
7 |
8 |
21 |
2 |
3 |
=
3 |
5 |
1 |
7 |
8 |
21 |
3 |
2 |
=
3 |
5 |
1 |
7 |