Question

What is `490-:70`?

Answer 1

7

Explanation:

Notice that both numbers have a zero on the right. So we can write this as:

`490-:70 = 490/70`

`= (49xx10)/(7xx10)`

`=49/7xx10/10`

`=49/7xx1`

`=(cancel(49)^7)/((cancel(7)^1)) = 7`