Question

Вычислите: 1)(3,65- 2 3 дробь 4) : 3+ 17 дробь 40×12= 2)(9,4+ 1 17 дробь 20) : 1 7 дробь 8+25×3 дробь 8=

Answer 1

1)(3,65- 2³/₄) : 3+ ¹⁷/₄₀×12= 5,4
3,65- 2³/₄ = 3,65- 2,75 = 0,9
0,9 : 3 = 0,3
¹⁷/₄₀×12 = ¹⁷ˣ¹²/₄₀ = ¹⁷ˣ³/₁₀ = ⁵¹/₁₀ = 5,1
0,3 + 5,1 = 5,4

2)(9,4+ 1¹⁷/₂₀) : 1⁷/₈+25׳/₈= 15,375
9,4+ 1¹⁷/₂₀ = ⁹⁴/₁₀+ ³⁷/₂₀ = ⁹⁴ˣ²/₂₀+ ³⁷/₂₀ =  ¹⁸⁸/₂₀+ ³⁷/₂₀ = ¹⁸⁸⁺³⁷/₂₀ = ²²⁵/₂₀ = ⁴⁵/₄
⁴⁵/₄ : 1⁷/₈ = ⁴⁵/₄ : ¹⁵/₈ =  ⁴⁵/₄ × ⁸/₁₅ = ⁴⁵ˣ⁸/₄ₓ₁₅ = ³ˣ²/₁ₓ₁ = ⁶/₁ = 6
25׳/₈ = ²⁵ˣ³/₈ = ⁷⁵/₈ = 9,375
6 + 9,375 = 15,375