Mixed Tens and Twenties

This subtraction worksheet provides mixed practice subtracting 10 or 20 from two-digit numbers in a horizontal format. Learners determine whether to reduce a number by one ten or two tens, reinforcing flexible thinking and strong place-value understanding while building mental math fluency.

Instructional Objectives

• Skill Focus (Grades 2-3): Subtract 10 or 20 from two-digit numbers accurately using mental math strategies.
• Conceptual Understanding (Grades 2-3): Understand how subtracting one ten versus two tens affects the value of a number.
• Algebraic Reasoning (Grade 3): Analyze number structure to choose the correct subtraction strategy efficiently.
• Curriculum Alignment (Grades 2-3): Supports subtraction within 100, mixed multiples-of-ten subtraction, place-value reasoning, and mental math fluency standards.

The mixed format encourages students to think about which operation applies rather than relying on repetition. Repeated exposure strengthens recognition of base-ten patterns and helps learners compute quickly and accurately.

Learning Benefits

• Builds flexibility with subtracting multiples of ten
• Reinforces place-value and base-ten understanding
• Encourages quick, confident mental computation
• Effective for warm-ups, independent practice, or skill reinforcement

This printable worksheet offers focused, confidence-building practice that helps students master mixed subtraction of tens and twenties while strengthening number sense and mental math skills.

This worksheet is part of our Subtract by 10s and 20s Worksheets collection.