Wykonaj podane działania :
a) (1 3/4-11/20)*(2 1/2-1 7/18) =
b) (3 1/2 - 1 1/6)*(1 3/7 - 11/14)=
c) (3 2/5 - 3 2/35)*(1 1/18 + 1/2)=
d) (1 1/3 - 1 2/9) * (1 4/5 + 9/10)=
e) (1 3/4 + 1/8) * (3 3/10 - 2 29/50) =
f) ( 1 /12 + 2 1/10) * (2 1/2 - 1 3/7) =
Musze mieć to rozpisane .
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a) (1 3/4-11/20)*(2 1/2-1 7/18)=(35/20-11/20)*(45/18-25/18)=24/20*20/18=4/3=1 1/3
b) (3 1/2-1 1/6)*(1 3/7-11/14)=(21/6-7/6)*(20/14-11/14)=14/6*9/14=3/2=1 1/2
c) (3 2/5-3 2/35)*(1 1/18+1/2)=(119/35-107/35)*(19/18+9/18)=2/35*28/18=28/315
d) (1 1/3-1 2/9)*(1 4/5+9/10)=(1 3/9-1 2/9)*(18/10+9/10)=1/9*27/10=3/10
e) (1 3/4+1/8)*(3 3/10-2 29/50)=(14/8+1/8)*(3 15/50-2 29/50)=15/8*(2 65/50-2 29/50)=15/8*36/50=108/80=1 7/20