Question

subtract 21 from the sum of products of 12*20 and 20*62

Answer 1

Answer:

12*20 = 240

20*62 = 1240

so 1240 + 240 = 1480

then 1480 - 21 = 1459

hope its help you

Answer 2

{(12*20) + (20*62)} - 21

20(12 + 62) - 21

20(74) - 21

1480 - 21

= 1459

Or

{(12*20) + (20*62)} - 21

{240 + 1240} - 21

1480 - 21

= 1459