Rozwiąz równania
(-5)+(-3)=
20+(-5)=
-16+16=
(-13)-4=
-7-(-12)=
(-5)-0=
Rozwiąż równanie z sprawdzeniem
x-(-3)=5 (-8)+x=2
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(-5)+(-3)= -8
20+(-5)= 15
-16+16= 0
(-13)-4= -17
-7-(-12)= 5 , bo 2 minusy dają plusa
(-5)-0= -5
(-5)+(-3)=-5-3=-8
20+(-5)=20-5=15
-16+16=0
(-13)-4=-17
-7-(-12)=-7+12=5
(-5)-0=-5
x-(-3)=5
x+3=5
x=5-3
x=2 spr. 2-(-3)=2+3=5 L=P
(-8)+x=2
x=2+8
x=10 spr. -8+10=2 L=P