54 x 77 + 27 x 46
= ( 54 : 2) x 77 + 27 x 46
= 27 x 77 + 27 x 46
= 27 x ( 77 + 46 )
= 27 x 123
= 3321
54 x 77 + 27 x 46
= ( 54 : 2 ) x ( 77 x 2 ) + 27 x 46
= 27 x 154 + 27 x 46
= 27 x ( 154 + 46 )
= 27 x 200
= 5400
54 x 77 + 27 x 56
= 4158 + 1242
= 5400
54 x 77 + 27 x 46
= 2 x 27 x 77 + 27 x 46
= 2 x 27 x ( 77 + 46 )
= 2 x 27 x 123
=54 x 123
=6642
54 x 77 + 27 x 46
= 54 x 77 + 27 x 2 x 23
= 54 x 77 + 54 x 23
= 54 x ( 77 + 23 )
= 54 x 100
= 5400
k mình nhé