Find the Missing Factor Multiplication Worksheet Grade 3
About this worksheet
Eighteen equations with one factor replaced by an empty box, three columns of six, under the instruction “Write the missing number in each box to make the equation true.” The blank moves position deliberately: sometimes it is the first factor, as in 5 = 45, and sometimes the second, as in 6 x = 42. Products run from 12 up to 80.
This asks something different from a page of straight facts. A child has to work backward from the product, which is the same reasoning division depends on, so this page quietly does double duty before division is formally taught. It is also a good diagnostic: a child who can find products quickly but stalls on the missing box is recalling facts in one direction only, and that is worth knowing before the tables are declared finished.
What students will practice
- Find an unknown factor in a multiplication equation
- Use a known product to work backward to a factor
- Write the missing number in the box
Details
- Grade level
- Grade 3
- Subject
- Math · Multiplication
- Pages
- 1
- Format
- PDF · US Letter and A4 included
- License
- Free for classroom use · Attribution appreciated
- Last updated
- September 9, 2026
