each box has 10 pencils . how many pencils do 3 boxes have ?
10 * 3 = ?
Count by 10's three times.
To find out how many pencils 3 boxes have, you can multiply the number of pencils in one box by the number of boxes.
In this case, each box has 10 pencils, so we can calculate:
10 pencils/box * 3 boxes = 30 pencils
Therefore, 3 boxes have a total of 30 pencils.