1+5+1+5+1+5+1+5+1+5+1
=(1x6)+(5x5)
=6 +25
=31
1+5+1+5+1+5+1+5+1+5+1
=(5x5)+(1x6)
=25+6
=31
1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1
= ( 1 x 6 ) + ( 5 x 5 )
= 6 + 25
= 31
1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 +1 = 31
1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1
= 31
1+5+1+5+1+5+1+5+1+5+1
=(1x6)+(5x5)
=6+25
=31 nha
1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 = 31 hoặc 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 = 1 x 6 + 5 x 5 = 31
1+ 5+1+5+1+5+1+5+1+5+1 = ?
=(1x6) +( 5x5)
= 6+25
= 31
1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1 + 5 + 1
= ( 1 + 1 + 1 + 1 + 1 + 1 + 1 ) + ( 5 + 5 + 5 + 5 + 5 )
= 1 x 6 + 5 x 5
= 6 + 25
= 31