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3,2:(0,8-2/5)=32/10:(8/10-2/5)=32/10:(8/10-4/10)=32/10:4/10=32/10*10/4=8
2/3*(1/2-1/6)=2/3*(3/6-1/6)=2/3*2/6=2/9
(1-7/9)*(5,2-0,7)=(9/9-7/9)*(52/10-7/10)=2/9*45/10=1
123:10+0,2*6,1=12,3+1,22=13,52
(6,5-4,7):(4-2 1/5)=(65/10-47/10):(4-11/5)=18/10:(20/5-11/5)=18/10:9/5=18/10*5/9=1
(1,5-1 1/3)*2 2/5-0,1=(15/10-4/3)*12/5-1/10=(45/30-40/30)*12/5-1/10=5/30*12/5-1/10=2/5-1/10=4/10-1/10=3/10
(6,25-2 1/2):2 1/7-1=3,75:15/7-1=375/100:15/7-1=375/100*7/15-1=7/4-4/4=3/4
b 3,2 : (0,8 - 2/5) = 3,2 : (0,8 -0,4) = 3,2 :0,4 -=8
Mam tylko do b bo tyle robiliśmy w klasie mam nadziej że choć trochę pomogłam :)