Bài làm
( 10 + 20 + 30 + ..... + 900 ) x ( 60 x 1 - 60 )
= ( 10 + 20 + 30 + ...... + 900 ) x ( 60 - 60 )
= ( 10 + 20 + 30 + ...... + 900 ) x 0
= 0
=(10+20+30+...+900) x(60-60)
=(10+20+30+...+900)x0
=0
(10+20+30+..................+900)*(60*1-60)
=(10+20+30+..............+900)*(60-60)
=(10+20+30+................+900)*0
=0
chuc bn hoc tôt^_^
Trả Lời :
(10 + 20 + 30 + ................. + 900) x (60 x 1 - 60)
=(10 + 20 + 30 + ................. + 900) x (60-60)
=(10 + 20 + 30 + ................. + 900) x 0
=0
Trả Lời :
(10 + 20 + 30 + ................. + 900) x (60 x 1 - 60)
=(10 + 20 + 30 + ................. + 900) x (60-60)
=(10 + 20 + 30 + ................. + 900) x 0
=0
Trả Lời :
(10 + 20 + 30 + ................. + 900) x (60 x 1 - 60)
=(10 + 20 + 30 + ................. + 900) x (60-60)
=(10 + 20 + 30 + ................. + 900) x 0
=0
Trả Lời :
(10 + 20 + 30 + ................. + 900) x (60 x 1 - 60)
=(10 + 20 + 30 + ................. + 900) x (60-60)
=(10 + 20 + 30 + ................. + 900) x 0
=0