Question

b) 25 x 20 x 125 x 8 – 8 x 20 x 5 x 125

Answer 1

=500000-100000

=400000

Answer 2

b) 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125

= 25 x 20 x 25 x 5 x 8 - 8 x 20 x 5 x 5 x 25

= 25 x 20 x 25 x 40 - 8 x 10 x 25 x 25

= 500 x 1000 - 80 x 625

= 500 000 - 50000

= 450000

Answer 3

 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125

= 25 x 20 x 25 x 5 x 8 - 8 x 20 x 5 x 5 x 25

= 25 x 20 x 25 x 40 - 8 x 20 x 25 x 25

= 500 x 1000 - 160 x 625

= 500 000 - 100000

= 400000

Answer 4

   25 x 20 x 125 x 8 -  8 x 20 x 5 x 25

= (125 x 8) x 20 x  (25 - 5) 

= 1000 x 20 x  20

= 1000 x 40

= 40000

Answer 5

25×20×125×8-8×20×5×125

=500000-100000

=400000