Multiply by 20 Answer Key

This worksheet gives students extensive practice multiplying various numbers by 20. The repeated exposure helps learners understand that multiplying by 20 is equivalent to doubling a number and then multiplying by 10. Students work through a large set of horizontal expressions, reinforcing pattern recognition and strengthening number sense. By solving both simpler and more complex combinations, learners improve their fluency and flexibility using multiples of 10 beyond the basic 10-times table. This sheet is useful for independent practice, concept reinforcement, or targeted intervention. Students develop a deeper understanding of how scaling by 20 affects numerical values.

Curriculum Matched Skills

Mathematics – Multiplying by Higher Multiples of 10

Mathematics – Number Sense and Scaling

Mathematics – Multi-Step Reasoning (Double + Multiply by 10)

Mathematics – Fluency with 20 as a Multiplicative Factor

This worksheet is part of our Multiply by 10s Worksheets collection.