Oblicz
a) 5¾+(-1½)}+(-7⅗)=
b) 6,3·4+(-4,2)=
c) -2,46-(-2⅖)=
d) 9-(-5,5)-3¼=
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a) 5¾+(-1½)}+(-7⅗)=5,75-1,5-7,6=-3,35
b) 6,3·4+(-4,2)=25,2-4,2=21
c) -2,46-(-2⅖)=tutaj krótko -2,46+2,4=-0,6
d) 9-(-5,5)-3¼=14,5-3,25=11,25