Oblicz, pamiętając o kolejności wykonywania działań
a)
1²/₃ : 2½ + 9 x 1⅙
b)
(1½)² - 1⅗ : 2⅔
c)
3¼ : [(2⅝ - 1⅙) : 2½]
1²/₃ : 2½ + 9 x 1⅙= ²/₃+10 ½= ⁴/₆+10 ³/₆= 10 ⁷/₆= 11 ¹/₆
(1½)² - 1⅗ : 2⅔= 2¼ - ³/₅= 1 ¹³/₂₀
3¼ : [(2⅝ - 1⅙) : 2½]= 3¼ : [1¼ : 2½]= 3¼ : ½= ¹³/₂ = 6½
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a)
1²/₃ : 2½ + 9 x 1⅙= ²/₃+10 ½= ⁴/₆+10 ³/₆= 10 ⁷/₆= 11 ¹/₆
b)
(1½)² - 1⅗ : 2⅔= 2¼ - ³/₅= 1 ¹³/₂₀
c)
3¼ : [(2⅝ - 1⅙) : 2½]= 3¼ : [1¼ : 2½]= 3¼ : ½= ¹³/₂ = 6½