18-3x6x7=18-18x7=18x(1-7)=18x(-6)=-108
18-3.6.7
=18-18.7
=18.(1-7)
=18.-6
=-108
18-3.6.7
=18-(3.6).7
=18-18.7
=18-126
=-108
= 18 - 18.7
=18(1-7)
=18.(-6)=-108
18-3.6.7
=18-18.7
=18(1-7)
=18.(-6)
=-108
18-3.6.7
=18-126
=-108
hok tốt
18 - 3.6.7
= 18 - 18.7
= 18.( 1 - 7 )
= 18. ( - 6 )
= - 108
\(18-3.6.7\)
\(=18-18.7\)
\(=18.\left(1-7\right)\)
\(=18.\left(-6\right)\)
\(=-108\)