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1 i -1
3 i -3
4 i -4
9 i -9
suma tych liczb wynosi 0
Zad2
-10+(-10)=-20
5 i -5 suma 0
10 i -10 suma 0
23 i -23 suma 0
1 i -1 suma 0
-20=-15+(-5)
np. 5+(-5)= 0; 6+(-6)=0; 0,5+(--,5)=0; 1=(-1)=0; 3+(-3)=0
2. -20 = (-5)+(-15)=-(10)+(-10)=(-19)+(-1)