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Library Detectives: Crack the Missing Number

Grade 3 practice finding the unknown number in equations like 8 × ? = 48 and ? ÷ 5 = 6, with library shelf and book stories.

Grade 3MathInteractive · Printable

Aligned to3.OA.A.4

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What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
13 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 3
Subject: Math
Question types: Fill in the blank, Multiple choice, Matching, Circle the answer, Short answer

About this worksheet

What students practice

Students find the unknown factor, product, dividend, or divisor in an equation within 100.
Students use a related multiplication fact to solve a division equation.
Students write and solve an equation with an unknown for a story.

How to use

Use after students know multiplication facts to 10 × 10. Remind them to check each answer by putting it back into the equation, then let pairs compare their work on the open questions.

Curriculum