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b)10/18+3/4 :3/5
b)2/3*5/6+3/4 : 3/5=10/18+3/4*5/3=10/18+5/4=20/36+45/36=65/36=1 29/36
c) 2¹/₃ * 6 - 3¹/₃ : 2 ¹/₆ =7/6*6-10/3*6/13=7-20/13=91/13-20/13=71/13=5 6/13
d)5¹/₂ + 3¹/₄ : ¹/₄ + 2¹/₂ * ¹/₅ =11/2+13/4*4/1+5/2*1/5=11/2+13+1/2=13+12/2=13+6=19
e) (⁵/₇ - ¹/₂) : (²/₃ * ¹/₄) =(10/14-7/14):2/12=3/14*2/12=36/28=9/7=1 2/7
f) [5¹/₄ : (1¹/₂)³] : ¹/₃ =[ 21/4 : 9/4]:1/3=(21/4*4/9):1/3=7/3*3/1=7
g) (3¹/₂ + 4) * (¹/₂)² =7 1/2*1/4=15/2*1/4=15/8=1 7/8
h) [12¹/₃ - (3¹/₃)²] * (12 : 1¹/₃)² = (37/3-100/9)*(12*3/4)²=(111/9-100/9)*81=11/9*81=99
Wydaje mi się, że jest dobrze:).