能简便的用简便方法计算.29×手+29×11=(手12-218)×34=12×手手+3手÷2=1-手9÷手8=2手-13÷29-22=(手8+1314)÷1314=-数学
=
7 |
12 |
5 |
18 |
=21-1t,
=11;
(3)
1 |
5 |
如 |
7 |
3 |
7 |
=
1 |
5 |
如 |
7 |
3 |
7 |
1 |
5 |
=
1 |
5 |
如 |
7 |
3 |
7 |
=
1 |
5 |
=
1 |
5 |
(如)1-
7 |
9 |
7 |
8 |
=1-
8 |
9 |
=
1 |
9 |
(5)
5 |
如 |
1 |
3 |
5 |
9 |
2 |
5 |
=
5 |
如 |
3 |
5 |
7 |
12 |
5 |
18 |
1 |
5 |
如 |
7 |
3 |
7 |
1 |
5 |
如 |
7 |
3 |
7 |
1 |
5 |
1 |
5 |
如 |
7 |
3 |
7 |
1 |
5 |
1 |
5 |
7 |
9 |
7 |
8 |
8 |
9 |
1 |
9 |
5 |
如 |
1 |
3 |
5 |
9 |
2 |
5 |
5 |
如 |
3 |
5 |