=67 bạn nhé!
nhớ k cho mình nha
4 + 3 + 9 + 12 + 15 + 24 = 67
4 + 3 + 9 + 12 + 15 + 24
= ( 4 + 24 ) + ( 3 + 9 + 12 + 15 )
= [ 4( 1 + 6 ) ] + [ 3( 1 + 3 + 4 + 5 ) ]
= 4.7 + 3.13
= 4.7 + 3.7 + 3.6
= 7( 4 + 3 ) + 3.6
= 7.7 + 3.6
= 49 + 18
= 67
4+3+9+12+15+24
=7+3+9+12+15+24
=10+9+12+15+24
=19+12+15+24
=31+15+24
=46+24
=70
4 + 3 + 9 + 12 + 15 + 24
= 7 + 9 + 12 + 15 + 24
= 16 + 12 + 15 + 24
= 28 + 15 + 24
= 43 + 24
= 67