Question

If you know that 8×300=2,400, how can you find 8×320? Explain.

Answer 1

If 8x300=2,400, then 8x320 would equal 2,560. Why? Because 8x20=160. 2,400+160=2,560.
Hope this helps! :)

Answer 2

we have

`8*300=2,400`

we know that

`320=(300+20)`

so

`8*320=8*(300+20)=8*300+8*20`

substitute the value of
`8*300=2,400`

`8*320=2,400+8*20=2,400+160=2,560`