Question

Jay earned $220 during the summer for delivering magazines. He bought 5 shirts worth $15 each using his magazine money. How much money was left after he bought the shirts?

Answer 1

$15 x 5=$75
$220 - $75=$145

Answer 2

He had $145 dollars left over 
15 times 5 is 75 
200-75 is 125
125+20 is 145 
that how i did it 
it is a good method for mental math