a) 3 1/2 -(5 1/2- 6 1/3 * 9/19) * 1 2/5
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b) (1 2/3) do potęgi -1 * [2 1/3 : 0,25 - 1/2 *(-2 1/3)]
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a) 3 ½ -(5 ½- 6 ⅓ * ⁹/₁₉) * 1 ²/₅ = ⁷/₂ - (5 ½ - ¹⁹/₃ * ⁹/₁₉)*⁷/₅ = ⁷/₂ - (5 ½ - 3)*⁷/₅ = ⁷/₂ - (5 ½ - 3)*⁷/₅ = ⁷/₂ - 2 ½*⁷/₅ = ⁷/₂ - ⁵/₂ * ⁷/₅ = ⁷/₂ - ⁷/₂ = 0
b) (1 ⅔)⁻¹ * [2 ⅓ : 0,25 - ½ *(-2 ⅓)] = ³/₅ * [⁷/₃ * ¼ -½ * (-⁷/₃)] = ³/₅ * [⁷/₁₂ + ⁷/₆] = ³/₅ * [⁷/₁₂+¹⁴/₁₂] = ³/₅ * ²¹/₁₂ = ²¹/₂₀ = 1 ¹/₂₀
a) 3 1/2 - ( 5 1/2 - 6 1/3 * 9/19 ) * 1 2/5 = 3 1/2 - ( 5 3/6 - 6 2/6 * 9/19 ) * 7/5 = 3 1/2 - ( -1 1/6 * 9/ 19 ) * 7/5 = 3 1/2 - ( -7/2 ( w skróceniu- 7/2) * 9/19 ( w skróceniu- 3/19) ) * 7/5 = 3 1/2 - (-14/38) * 7/5 = 3 1/2 + 14/18 * 7/5 (nie skróci się) = 3 1/2 + 98/90 = 3 1/2 + 1 8/90 = 3 45/90 + 1 8/90 = 4 53/90
b) (1 2/3) do potęgi -1 * [2 1/3 : 1/4 - 1/2 * ( -7/3) ]= -1 2/3 * [ 7/3 * 4/1 (nie skróci się) - 1/2 * ( - 7/3) ] = - 1 2/3 * 28/ 8 - (- 7/6)] = - 5/3 * 28/ 8 ( nie skróci się) + 1 1/6 ] = - 140/24 + 1 1/6 = 5 20/24 + 1 4/24 = 7
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