C1 : ( 2,45 + 7,15 ) + 2,51
= 9,6 + 2,51
= 12,11
cách 1 : ( 2,45 + 7,15 ) + 2,51
= 9,6 + 2,51
= 12,11
cách 2 : (2,45 + 7,15 ) + 2,51
= 2,45 + ( 7,15 + 2,51 )
= 2,45 + 9,66
= 12,11
C1:[2,45 +7,15]+2,51=9,6+2,51=12,11
C2:[2,45 +7,15]+2,51=2,45+[7,15+2,51]=2,45+9,66=12,11
C1: ( 2,45 + 7,15) + 2,51
= 9.6 + 2,51
= 12,11
C2 : ( 2,45 + 7,15) + 2,15
= 2,45 + ( 7,15 + 2,51 )
= 2,45 + 9,66
= 12,11
tk mk nha bn
=