30+90+10+60+70+40+20+80+50+50
=(30+70)+(90+10)+(60+40)+(80+20)+(50+50)
=100+100+100+100+100
=100.5
=500
= 500
k mình nhé
hôm qua cũng thế mà
30 + 90 + 10 + 60 + 70 + 40 + 20 + 80 + 50 + 50
= ( 30 + 70 ) + ( 90 + 10 ) + ( 60 + 40) + ( 20 + 80 ) + ( 50 + 50 )
= 100 x 5
= 500
nha bn
30 + 90 + 10 + 60 + 70 + 40 + 20 + 80 + 50 + 50
= (30 + 70) + (10 + 90) + (60 + 40) + (20 + 80) + (50 + 50)
= 100 + 100 + 100 + 100 + 100
= 500
ai k mk, mk k lại
mk thề, mk ko nói xạo
=(30+70)+(90+10)+(60+40)+(20+80)+(50+50)
=100+100+100+100+100
=500