oblicz wartości wyrażeń
a) (4/5:2/5-0,8*15/16)+2/5*2,5=
b) (3 1/5*5/8+4,5:3 3/4)-0,16*1/4=
/-kreska ułamkowa
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a)=(4/5*5/2-8/10*15/16)+2/5*5/2=(2-4)+1=-2+1=-1
b)=(16/5*5/8+9/2*4/15)-0,16*1/4=(2+6/5)-0,04=16/5-1/25=80/25-1/25=79/25=3,16