10 + 20 + 30 + 50 + 70 + 90 = 270
10 + 20 + 30 + 50 + 70 + 90 = 270
k mk , mk k lai
10 + 20 + 30 + 50 + 70 + 90 = 270
nha bn k mk mk sẽ k laj nha
thanks nhju
\(10+20+30+50+70+90\)
\(=270\)
chuc bn hoc gioi!
nhae
~~~~~~~~~~
10 + 20 + 30 + 50 + 70 + 90
= ( 90 + 10 ) + ( 30 + 70 ) + ( 20 + 50 )
= 100 + 100 + 70
= 270
10 + 20 + 30 + 50 + 70 + 90 = 270
k mình nha bạn
10+20=30
30+30=60
60+50=110
110+70=180
180+90=270