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2.(3.93 - 1 3/4 ) * (5 2/5 +3.4)=2,18*8,8=19,184
3.(1 3/4 + 1/2) :3/4 + (1/2 - 3/4 * 2/3)=2,25 : 3/4 + 0 = 3
4. [ 4: ( 1 : 5/6 ) - 17 1/5 ] :3 2/5 = [4: 1,2 -17 1/5]: 3 2/5=
=-13,9 : 3,4 = -4
5.{[0.3 * (5/6 + 2.75) * 2/3 + 5.625] : 73/4} : 2.5
______________________________ =
4/7
=[(6,345 : 73/4) : 2,5]:4/7= 0,24
Przykłady 3,4,5 są w zaokrągleniu