Răspuns:
[tex]250+50=300+50=350+50=400+50=450+50=500\\\\400+25=425+25=450+25=475+25=500+25=525\\\\20+20=40+40=80+80=160+160=320+320=640+640=1280\\\\800-400=400-200=200-100=100-50=50-25=25\\\\910-90=820-90=730-90=640-90=550-90=460\\\\884-109=775-109=666-109=557-109=448-109=339[/tex]
a)250,300,350,400,450,500,550,600,650,700
b)20,40,80,140,220
c)910,820,730,640,530,420,310
d)400,425,450,475,500,525,550,575,600
e)800,400,200,100
f)884,775,666,553
