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Qual a distância de:

a) 0 a +8 ____________________
b) + 7 a 0____________________
c) 0 a -10_____________________
d) -5 a 0___________________
e) -3 a +3__________________
f) -5 a +2_________________
g) +4 a +10___________________
h) -10 a -4__________________