Question

Exerciţii 1. Calculați: a)-3-(-3)=;
b)-8-(+4)=;
c) + 5-(-9)=;
d) + 4-(+15) =
e) - 11- (-15)=;
f)-17-(+16)=;
g) +20 - (-19) = ;
h) + 24- (+30) = .​

Answer 1

Răspuns:

$a)-3-(-3)=-3+3=0\\\\b)-8-(+4)=-8-4=-12\\\\c) + 5-(-9)=5+9=14\\\\d) + 4-(+15) =4-15=-11\\\\e) - 11- (-15)=-11+15=4\\\\f)-17-(+16)=-17-16=-33\\\\g) +20 - (-19) =20+19=39 \\\\h) + 24- (+30) = 24-30=-6$