Find the Unknown Factor: Trashketball Review Questions
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Find the Unknown Factor: Trashketball Review Questions
Trashketball and Around the World questions for the missing number in a multiplication or division fact, Grade 3: 24 numbered questions to read aloud or project, such as 6 × ? = 42. With an answer key, for any no-tech review game.
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- Pages
- 2
- Last updated
- Time
- About 20 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Find the missing number in an equation such as 8 × ? = 48 or 56 ÷ ? = 7, and think of division as finding the unknown factor in a multiplication.
Reviewed by Ms. Olivia Parker, Teacher. How we check worksheets
How to use this sheet
- Have the child read each equation aloud, saying "what number" for the box.
- Use the times table the child knows best to find each missing factor.
- Ask the child to check each answer by putting it in the box and working out the equation.
Common mistakes
- Writing the product in the box. For 4 × ☐ = 20, the box is a factor, 5, not 20.
- Dividing the wrong way, as in 4 ÷ 20. The product is divided by the known factor.
- Adding or subtracting to find the box, so 4 × ☐ = 20 gets 16. The sign is times.
