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Missing Numbers at the Aquarium

Grade 1 practice finding the missing number in addition and subtraction equations within 20, with fish, seal, and jellyfish stories.

Grade 1MathInteractive · Printable

Aligned to1.OA.D.8

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What’s included

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

Details

Format: Interactive · Printable
Grade: Grade 1
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 number in addition equations within 20.
Students find the unknown number in subtraction equations within 20.
Students check a missing number by putting it back into the equation.

How to use

Use after students know addition and subtraction facts within 20. Have them check each answer by reading the equation aloud with their number in the blank.

Curriculum