Odpowiedź:
10.
c) 1 4/7 : 0,042 = 11/7 : 42/1000 = 11/7 : 21/500 = 11/7 • 500/21 = 5500/147 = 37 61/147
e) 0,72 : 1 2/7 = 72/100 : 9/2 = 18/25 • 2/9 = 2/25 • 2/1 = 4/25
g) 5 5/6 : 5,25 = 35/6 : 525/100 = 35/6 : 21/4 = 35/6 • 4/21 = 35/3 • 2/21 = 70/63 = 1 13/63
12.
c) (1,2):(1,2)^2=(1,2)^(-1)= 10/12 = 5/6
e) (-1,69):(1,3)^2=(-1,69):1,69= (-1)
