помогите пж
2 3/4:1,1+3 1/3
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2,5-0,4×3 1/3​

Пошаговое объяснение:

(2 3/4÷1,1+3 1/3) ÷ ( 2,5-0,4×3 1/3) = 5

1) 2 3/4 ÷ 1,1 + 3 1/3 = 11/4 ÷ 11/10 + 10/3 = 5/2 + 10/3 = (5×3+10×2)/6 = (15+20)/6 = 35/6 = 5 5/6

2) 2,5 - 0,4 × 3 1/3 = 5/2 - 4/10 × 10/3 = 5/2 - 4/3 = (5×3-4×2)/6 = (15-8)/6 = 7/6 = 1 1/6

3) 5 5/6 ÷ 1 1/6 = 35/6 ÷ 7/6 = 35/6 × 6/7 = 5