We are given statement: The sum 7 fifteens and 38 fifteens .
Solution: It is said 7 fifteens.
So, 15 is written 7 times, that is
15 + 15 + 15 + 15 + 15 + 15 + 15 .
15 + 15 + 15 + 15 + 15 + 15 + 15 can be written as 7 times 15 or 7× 15.
Then, 38 fifteens.
So, 15 is written 38 this time.
So, 38 fifteens could be written as 38 × 15.
Now, the sum 7 fifteens and 38 fifteens can be written finally as :
7 × 15 + 38 × 15 This is our final expression.
