Answer:
[tex]1) \ \ \boxed{3}: 7 =24 : 56[/tex]
Solution: 7 x 24 = 168 ÷ 56 = 3
[tex]2) \ \ 8:3 = \boxed{40}: 15[/tex]
Solution: 8 x 15 = 120 ÷ 3 = 40
[tex]3) \ \ 12: \boxed{4}= 15:5[/tex]
Solution: 12 x 5 = 60 ÷ 15 = 4
[tex]4) \ \ 4:16 = \boxed{2}: 8[/tex]
Solution: 4 x 8 = 32 ÷ 16 = 2
[tex]5) \ \ 27:\boxed{45}= 9:15[/tex]
Solution: 27 x 15 = 405 ÷ 9 = 45
[tex]6) \ \ 11:\boxed{15}= 330 : 450[/tex]
Solution: 11 x 450 = 4950 ÷ 330 = 15
[tex]7) \ \ 35:\boxed{14}= 20:8[/tex]
Solution: 35 x 8 = 280 ÷ 20 = 14
[tex]8) \ \ 12 : 15 = \boxed{8}: 10[/tex]
Solution: 12 x 10 = 120 ÷ 15 = 8
[tex]9) \ \ 5: \boxed{3}= 30 : 18[/tex]
Solution: 5 x 18 = 90 ÷ 30 = 3
[tex]10) \ \ 20:12 = 15: \boxed{9}[/tex]
Solution: 12 x 15 = 180 ÷ 20 = 9
