Students examine each fact family triangle with sums up to 20 and write all four related equations. Working with larger numbers challenges students to apply their understanding of fact family relationships beyond the basics.
Use after students are fluent with facts within 10. This is a natural progression that builds toward 2nd grade fluency expectations. Pair with number line or hundreds chart for students who need visual support.
If your child struggles with the larger numbers, practice skip-counting from the smaller number up to the sum. For subtraction, count back from the larger number. These strategies build confidence.
This worksheet supports the following Common Core State Standards for Mathematics:
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Write all four addition and subtraction facts for each fact family with sums within 20. Extends fact family practice to larger numbers.
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