Answer:
To determine how many boxes can be completely filled with 128 pencils, we can use division.
Dividing the total number of pencils by the number of pencils that can fit in each box, we get:
128 ÷ 9 = 14 remainder 2
This means that 14 boxes can be completely filled with 126 pencils (14 boxes x 9 pencils per box), and there will be 2 pencils remaining.
Therefore, 14 boxes can be completely filled with the 128 pencils, and there will be 2 pencils left over that won't fit in a complete box.