问题
解答题
用简便方法计算.
|
答案
(1)
5 |
12 |
2 |
5 |
4 |
5 |
12 |
5 |
=
5 |
12 |
2 |
5 |
4 |
5 |
5 |
12 |
=
5 |
12 |
2 |
5 |
4 |
5 |
=
5 |
12 |
6 |
5 |
=
1 |
2 |
(2)46.5-3.6-6.4+3.5,
=(46.5+3.5)-(3.6+6.4),
=50-10,
=40;
用简便方法计算.
|
(1)
5 |
12 |
2 |
5 |
4 |
5 |
12 |
5 |
=
5 |
12 |
2 |
5 |
4 |
5 |
5 |
12 |
=
5 |
12 |
2 |
5 |
4 |
5 |
=
5 |
12 |
6 |
5 |
=
1 |
2 |
(2)46.5-3.6-6.4+3.5,
=(46.5+3.5)-(3.6+6.4),
=50-10,
=40;