Mixed 8s and 9s Removal

This subtraction worksheet provides mixed practice subtracting 8 and 9 from numbers within 20 using a clear vertical format. Learners compute each difference and record answers neatly in provided boxes, strengthening accuracy, alignment, and confidence with two of the most challenging subtraction fact families.

Instructional Objectives

• Skill Focus (Grades 1-2): Subtract 8s and 9s from numbers within 20 using accurate vertical computation.
• Conceptual Understanding (Grades 1-2): Develop number sense by recognizing patterns and relationships in subtraction facts involving 8 and 9.
• Algebraic Reasoning (Grade 2): Apply flexible thinking to switch between subtraction strategies when working with mixed fact sets.
• Curriculum Alignment (Grades 1-2): Supports subtraction within 20, mixed fact fluency, operations and algebraic thinking, and computation accuracy standards.

By mixing 8s and 9s in the same practice set, students are encouraged to rely on reasoning rather than memorization alone. The consistent vertical layout reinforces proper alignment and careful work habits while supporting mental math development.

Learning Benefits

• Builds fluency and confidence with challenging subtraction facts
• Encourages flexible thinking across mixed operations
• Reinforces neatness and accuracy in vertical computation
• Effective for independent practice, review, or foundational skill building

This printable worksheet offers focused, confidence-building practice that helps students master mixed subtraction with 8s and 9s while strengthening number sense and readiness for more advanced operations.

This worksheet is part of our Subtract by 8s and 9s Worksheets collection.