1 x 5 x 6 x 3 + 5 x 9 x 8 x 4
= 5 x ( 1 x 6 x 3 ) + 5 x ( 9 x 4 x 8 )
= 5 x 18 + 5 x 288
= 5 x ( 18 + 288 )
= 5 x 306
= 1530
Hok tốt
1 x 5 x 6 x 3 + 5 x 9 x 8 x 4
= 5 x ( 1 x 6 x 3 ) + 5 x ( 9 x 4 x 8 )
= 5 x 18 + 5 x 288
= 5 x ( 18 + 288 )
= 5 x 306
= 1530