Question

On test day, a teacher sharpens 19 pencils to lend out to his students. If n represents the number of pencils that the teacher lends out, which expression represents the number of pencils he has left?
a. b.
c. d.

Answer 1

19 - n = the amount of pencil's he has left

^ The amount of pencils he has, n, the amount of pencil he gives away
The answer is, 19 - n = the expression for the pencil's left