25 x 20 x 125 x 8 - 8 x 20 x 5 x 15
= ( 8 - 8 ) x 25 x 20 x 125 x 20 x 5 x 15
= 0 x 25 x 20 x 125 x 20 x 5 x 15
= 0 ( vì số nào nhân 0 cũng bằng 0 )
= 500\(\times\)1000\(-\)( 8\(\times\)125 ) \(\times\)( 20\(\times\)5 )
= 500\(\times\)1000\(-\)1000\(\times\)100
= 1000\(\times\)( 500\(-\)100 )
= 1000\(\times\)400
= 400000
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
= 500 x 1000 - ( 8 x 125 ) x ( 20 x 5 )
= 500000 - 1000 x 100
= 500000 - 100000
= 400000
=500x125x8-8x20x5x125
=62500x8-8x20x5x125
=500000-8x20x5x125
=500000-160x5x125
=500000-800x125
=500000-100000
=400000
25×20×125×8-8×20×5×125
=500000-100000
=400000