Dodawanie i odejmowanie sum algebraicznych
wykonaj działania
a) a+(a-b)
b) 2x-(x+4)
c) 7-(-x+6)
d) -(x+4)+(x-5)
e) 1-(t+p)-(t-2)
f) -(-y+2)+(-2y-4)
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a)a+(a-b)=a+a-b=2a-b
b)2x-(x+4)=2x-x-4=x-4
c)7-(-x+6)=7+x-6=1+x
d)-(x+4)+(x-5)=-x-4+x-5=-9
e)1-(t+p)-(t-2)=1-t-p-t+2=3-2t-p
f)-(-y+2)+(-2y-4)=y-2-2y-4=-y-6