Question

2 7/10*(5 5/12-3 17/36)+2 2/3*1 1/2​

Answer 1

Ответ:

$1)5 \frac{5}{12} - 3 \frac{17}{36} = 5 \frac{15}{36} - 3 \frac{17}{36} = \\ 4 \frac{51}{36} - 3 \frac{17}{36} = 1 \frac{34}{36}$

$2)2 \frac{7}{10} \times 1 \frac{34}{36} = \frac{27}{10} \times \frac{70}{36} = \frac{3 \times 7}{4} = \\ = \frac{21}{4} = 5 \frac{1}{4}$

$3)2 \frac{2}{3} \times 1 \frac{1}{2} = \frac{8}{3} \times \frac{3}{2} = 4$

$4)5 \frac{1}{4} + 4 = 9 \frac{1}{4}$

Answer 2

2 ⁷/₁₀*(5 ⁵/₁₂-3 ¹⁷/₃₆)+2 ²/₃*1 ¹/₂ = 9¹/₄

5 ⁵/₁₂-3 ¹⁷/₃₆ = ⁶⁵/₁₂ - ¹²⁵/₃₆= ¹⁹⁵/₃₆ - ¹²⁵/₃₆= ⁷⁰/₃₆

2 ⁷/₁₀ х ⁷⁰/₃₆ = ²⁷/₁₀ х ⁷⁰/₃₆ = ¹⁸⁹/₃₆ = ⁶³/₁₂ = 5³/₁₂=5¹/₄

2 ²/₃ х 1 ¹/₂ = ⁸/₃ х ³/₂ = 4

4 + 5¹/₄ = 9¹/₄