Question

2.23×3/5+1.77÷1 又2/3+60%

Answer 1

2.23×3/5+1.77÷1 又2/3+60%= 2.23×3/5 + 1.77 ÷ 5/3 + 3/5 = 2.23×3/5 + 1.77×3/5 + 1 ×3/5 = (2.23+1.77+1) ×3/5 = 5 × 3/5 = 3