2 3/4 ÷ 5/10 - 2/5
= 11/4 ÷ 5/10 - 2/5
= 11/4 × 10/5 - 2/5
= 110/20 - 2/5
= 110/20 - 8/20
= 102/20
= 51/10
= 5 1/10
5 1/10
@££#£#(#(@)@₩
2 3/4 ÷ 5/10 - 2/5
= 11/4 ÷ 5/10 - 2/5
= 11/4 × 10/5 - 2/5
= 110/20 - 2/5
= 110/20 - 8/20
= 102/20
= 51/10
= 5 1/10
5 1/10
@££#£#(#(@)@₩