问题描述:
能简算的要简算13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
最佳答案:
(1)
13 |
49 |
13 |
49 |
=
13 |
49 |
=
13 |
49 |
=13
(2)(
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
能简算的要简算1349×21+28×1349;(34+58)×32;72×571.
问题描述:
能简算的要简算13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
(1)
13 |
49 |
13 |
49 |
13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
3 |
4 |
5 |
8 |
5 |
71 |
5 |
71 |
5 |
71 |
5 |
71 |
5 |
71 |
5 |
71 |