A) -5 2/3 + 3 2/7 = -28/5+23/7=
=-196/35+155/35 = -41/35
B) 3 2/5 - (-4 5/6)= 17/5+29/6=
=102/30+145/30= 243/30=8 1/10
C) 5 3/5*(-2 2/14)=28/5*(-30/14)=
=2*(-6)=(-12)
Bo 28 skróci się z 14, a 30 z 5
D) 2 2/15:(-4 4/5)=32/15:(-24/5)=
=32/15*(-5/24)=4/3*(-1/3)=(-4/9)
E) -14,7-(-1,783)=-14,7+1,783=12,917
F)-9,47*(-1,5)=14,205
G) 81,216:(-0,04)=(-2030,4)