Explain simply why 15 is the correct answer to: Matt can write 10 words a minute with his right hand and 7 words a minute with his left hand. How many words would Matt write in 5 minutes with his right hand than with his left?. Explanation:
The difference in writing speed is 10 words / minute - 7 words / minute = 3 words / minute. Matt can write 3 words / minute x 5 minutes = 15 more words with his right hand.