1) 9362
2) 4359
3) десятичная дробь
4)11379
30⁴/₅<span> - 1</span>²/₅ ×(1⁴/₅ <span>× (12</span>⁷/₁₂ - 9¹⁹/₃₆<span>)) - </span>¹⁷/₃₅ × 1¹¹/₃₄ <span>= 21</span>⁵³/₇₀<span>
1)</span>12⁷/₁₂ - 9¹⁹/₃₆ = ¹⁵¹/₁₂ - ³³³/₃₆ = ¹⁵¹ˣ³/₃₆ - ³³³/₃₆ = ⁴⁵³⁻³³³/₃₆ = ¹²⁰/₃₆ = ¹⁰/₃<span>
2) 1</span>⁴/₅ × ¹⁰/₃ = ⁹/₅ × ¹⁰/₃ = ⁹ˣ¹⁰/₅ₓ₃ = ³ˣ²/₁ₓ₁ = ⁶/₁ <span>
3) 1</span>²/₅ × ⁶/₁ = ⁷/₅ × ⁶/₁ = ⁷ˣ⁶/₅ = ⁴²/₅ = 8²/₅<span>
4) 30</span>⁴/₅ - 8²/₅ = 22⁴⁻²/₅ = 22²/₅<span>
5) </span>¹⁷/₃₅ × 1¹¹/₃₄ = ¹⁷/₃₅ × ⁴⁵/₃₄ = ¹⁷ˣ⁴⁵/₃₅ₓ₃₄ = ⁴⁵/₃₅ₓ₂ = ⁹/₇ₓ₂ = ⁹/₁₄<span>
6) 22</span>²/₅ - ⁹/₁₄ = ¹¹²/₅ - ⁹/₁₄ = ¹¹²ˣ¹⁴/₇₀ - ⁹ˣ⁵/₇₀ = ¹⁵⁶⁸/₇₀ - ⁴⁵/₇₀ = ¹⁵²³/₇₀ = 21⁵³/₇₀
6900 центнеров = 690 тонн.
Ответ: 690 тонн.