1 9/16 × 3 1/5 + 1 2/3 - 9 ÷ 2 2/5
1 9/16 = 25/16
3 1/5 = 16/5
25/16 × 16/5 = 5
9 ÷ 2 2/5 = 9 ÷ 12/5 = 45/12
5 + 1 2/3 - 45/12 = 6 8/12 - 45/12 = 6 8/12 - 3 9/12 = 5 20/12 - 3 9/12 = 2 11/12
ответ: 2 11/12.
