Odpowiedź:
2.
a) 8-(-9)+(-11)-5=8+9-11-5=17-16=1
-21+(-7)-15-(-32)=-21-7-15+32=-43+32=-11
-11-(-6)+(-5+8)=-11+6+3=-11+9=-2
-(6-9)-(-12+15)=-(-3)-(3)=3-3=0
b) 16-(-4+7)+(5-9)=16-3+(-4)=13-4=9
(-8+12-3)-(-6+13)=1-7=-6
-19-(-18-7)+(-34)=-19-(-25)-34=-19+25-34=-28
-27+(-26-17)+14=-27+(-43)+14=-27-43+14=-70+14=-56
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Odpowiedź:
2.
a) 8-(-9)+(-11)-5=8+9-11-5=17-16=1
-21+(-7)-15-(-32)=-21-7-15+32=-43+32=-11
-11-(-6)+(-5+8)=-11+6+3=-11+9=-2
-(6-9)-(-12+15)=-(-3)-(3)=3-3=0
b) 16-(-4+7)+(5-9)=16-3+(-4)=13-4=9
(-8+12-3)-(-6+13)=1-7=-6
-19-(-18-7)+(-34)=-19-(-25)-34=-19+25-34=-28
-27+(-26-17)+14=-27+(-43)+14=-27-43+14=-70+14=-56
Szczegółowe wyjaśnienie: