Cześć ;-)
Od a) do c)
[tex]-27+12=-(27-12)=-15\\\\-33+44=44+(-33)=44-33=11\\\\-23+(-17)=-(23+17)=-40[/tex]
Od d) do f)
[tex]16-60=-(60-16)=-44\\\\-15-25=-(15+25)=-40\\\\-30-(-50)=-30+50=50-30=20[/tex]
Od g) do i)
[tex]-\frac{3}{4}+(-\frac{3}{4}=-(\frac{3}{4}+\frac{3}{4})=-\frac{6}{4}=-1,5\\\\0,2-0,7=-(0,7-0,2)=-0,5\\\\-0,6-0,4=-(0,6+0,4)=-1[/tex]
Od j) do l)
[tex]-1-(-\frac{4}{7})=-1+\frac{4}{7}=-(1-\frac{4}{7})=-\frac{3}{7}\\\\5,5-(-0,8)=5,5+0,8=6,3\\\\-0,75+\frac{1}{4}=-0,75+0,25=-(0,75-0,25)=-0,5[/tex]
Pozdrawiam!
