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a.) (- ½):(-2)- 5/36 = (-½)*(-½)-⁵/₃₆=¼-⁵/₃₆=⁹/₃₆-⁵/₃₆=⁴/₃₆=¹/₉
b.) (- ⅚) : 2,5-(-2,25) x 1/9 = (-⅚):2½+2¼*¹/₉ = (-⅚):⁵/₂+⁹/₄*¹/₉ = (-⅚)*²/₅+¼ = -²/₆+¼ = -⁴/₁₂+³/₁₂ = -¹/₁₂
zad. 11 Od liczby -12,5 odejmij iloczyn 4⅓ i -3,9
-12,5-4⅓*(-3,9)=-12,5-¹³/₃*(-³⁹/₁₀)= -12,5-13*(-¹³/₁₀)=-12,5+¹⁶⁹/₁₀=-12,5+16,9 = 4,4
Zad.12 Oblicz różnicę ilorazu i iloczynu liczb -4,8 i 2⅔.
(-4,8)÷2⅔ - (-4,8)*2⅔ = -⁴⁸/₁₀÷⁸/₃ + ⁴⁸/₁₀*⁸/₃ = -²⁴/₅*³/₈ + ²⁴/₅*⁸/₃ = -⅗*3 + ⁸/₅*8 = -⁹/₅+⁶⁴/₅ = -⁵⁶/₅ = -11⅕