Addition and Subtraction Facts 1-18 Printable Workbook

Students recall addition and subtraction facts within 18 with increasing fluency across sequential practice pages.

Students understand subtraction as an unknown-addend problem by using addition to check a subtraction answer.

Students determine whether a given addition or subtraction equation is true or false, correcting any error.

Work through the workbook in its printed order — counting, addition sets, addition facts, subtraction sets, subtraction facts, then mixed review — since each section builds on the last (pages 2-19).

Use the color-by-code quilt page as a low-stakes fluency check partway through the subtraction unit (page 15).

The 'Checking Subtraction' page (page 17) is a good moment to introduce the idea that addition and subtraction are inverse operations.

Addition and subtraction fact fluency within 18 — students solve missing-number and standard equations across multiple practice sets (pages 5-8, 13-16).

Three-addend addition — students add three single-digit numbers in one equation (pages 9-10).

Inverse-operation checking — students subtract, then add to verify their answer (page 17).