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1/2:(3/4*2)=1/2 : 6/4=1/2*4/6=2/6=1/3
b)(1 1/2:2 1/4)*2=(3/2:9/4)*2=(3/2*4/9)*2=2/3*2=4/3=1 1/3
1 1/2:(2 1/4*2)=3/2:(9/4*2)=3/2:18/4=3/2*4/18=2/6=1/3
mysle ze wszystko zrozumiale. ;)