There are 547 cookies in Mr. Dobbs' bakery.
A third grade class buys 169 cookies.
Mr. Dobbs wants to use mental math to figure out how many cookies he has left.
First, he subtracts 100 from 547. Then he subtracts 40 from 447.
What should his next step be?
(1 point)
Responses
Subtract 7 from 407.
Subtract 7 from 407.
Subtract 20 from 407.
Subtract 20 from 407.
Subtract 40 from 407.
Subtract 40 from 407.
Subtract 9 from 407.