At a certain store, loose-leaf paper comes only in packages of 400 sheets. If a student buys enough paper at this store to fill 3 binders with 150 sheets of paper each, how many sheets will be left over?

A 350

explanation

Calculate: 3 × 150 = 450 sheets will be used.
Since the paper sells in packages of 400 sheets, 2 packages are needed, and 2 × 400 = 800.
800 − 450 = 350 sheets left over.