10 + 10 + 50 + 30 + 50 + 30 + 20
= 10 + 10 + 30 + 50 + 50 + 30 + 20
= 20 + 30 + 50 + 50 + 50
= 50 + 50 + 50 + 50
= 50 x 4
= 200
\(10+10+50+30+50+30+20\)
\(=\left(10+10+30+30+20\right)+\left(50+50\right)\)
\(=\) \(100\) \(+100\)
\(=\) \(200\)
giải
10 + 10 + 50 + 30 + 50 + 30 + 20
= ( 50 + 30 + 20 ) + ( 50 + 30 + 10 x 2 )
= 100 + ( 50 + 30 + 20 )
= 100 + 100
= 200
nhé !
10 + 10 + 50 + 30 + 50 + 30 + 20
= 200
ai k mk, mk k lại, mk thề mk ko nói xạo
10+10+50+30+50+30+20
=20+80+80+30+20
=100+110+20
=210+20
=230
10 + 10 + 50 + 30 + 50 +30 +20 = [ 50 + 50 ] + [ 10 +10 +30 + 20 +30 ] = 100 + 100 = 200