3 3/4 ÷ 1 8/10=.... 2 4/10 ÷2 2/9=.... 3 1/2 ÷ 1 5/7=....

3¾ ÷ 1 8/10
= 15/4 ÷ 18/10
= 15/4 × 10/18
= 75/36
= 2 3/36
= 2 1/12

2 4/10 ÷ 2 2/9
= 24/10 ÷ 20/9
= 24/10 × 9/20
= 3/5 × 9/5
= 18/25

3½ ÷ 1 5/7
= 7/2 ÷ 12/7
= 7/2 × 7/12
= 49/24
= 2 1/24

A. 3 3/4 : 1 8/10 = 15/4 : 18/10 = 15/4 × 10/18 = 25/12 = 2 1/12

B. 2 4/10 : 2 2/9 = 24/10 : 20/9 = 24/10 × 9/20 = 54/50 = 1 4/50 = 1 2/25

C. 3 1/2 : 1 5/7 = 7/2 : 12/7 = 7/2 × 7/12 = 49/24 = 2 1/24

Kalau gak salah begitu. Terimakasih ^_^