5. 24 : 8 : 3 21 : 7 × 8 2 × 6 : 3 2 × 9 : 6 27 : (9 : 3) 4 × (18 : 6) 0 × 19 3 × 10

24 : 8 : 3 = 3 : 3 = 1

21 : 7 × 8 = 3 × 8 = 24

2 × 6 : 3 = 12 : 3 = 4

2 × 9 : 6 = 18 : 6 = 3

27 : (9 : 3) = 27 : 3 = 9

4 × (18 : 6) = 4 × 3 = 12

0 × 19 = 0

3 × 10 = 30