= 100
11/9
3 x 3 = 9 nhé
1.D
2.B
3.C
4.B
5.B
6.B
10/15 - 2/5 = 10/15 - 6/15 = 4/15
1. D
2. B
3. 3/8 : 3/8 = 1 [m]
40 x 4/8 = 20 [ em]
25 x 3/5 = 15 [m]