36-1920 43+2355 58-3226
个直角 个角
5×6= 4×7+30= 8×9= 9×4+14=
7×7= 7×9-9= 6×7= 8×6-6=
69+8= 8×4+23= 55+30= 84-20+10=
4×3= 9×5-45= 6×6= 52-(25+5)=
1 |
7 |
3 |
8 |
5 |
2 |
6 |
4 |
6 |
4 |
3 |
7 |
1 |
8 |
5 |
2 |
6 |
28 |
45° 75° 102° 90° 140° 38° 86° 99° 153° 179°
谁的橡皮长?长多少?