67X103-67X5十67十67X2
=67X103-67X5十67x1十67X2
=67x(103-5+1+2)
=67x101
=67x(100+1)
=67x100+67x1
=6767
67X103-67X5十67十67X2
=67×(103-5+2)+67
=67×100+67
=6700+67
=6767
67×103-67×5+67+67×2
=67×103-67×5+67×1+67×2
=67×(103-5+1+2)
=67×(103-2)
=67×101
=67×(100+1)
=67×100+67×1
=6700+67
=6767
(103-5+1+2)*67