Created by Jennifer Dean
15 questions
1st - 2nd Grade
Math
Updated Nov 2025
Mixed Addition and Subtraction to 20 Level 6 is a free printable mathematics worksheet for students in Grades 1–2. It includes 15 fill-in-the-blank equations that mix addition and subtraction within 20, including problems such as 10 + 7, 18 − 5, and 14 − 6. Students write the missing numerical answer for each equation rather than selecting from multiple-choice options. This worksheet helps learners build accuracy and fluency with basic addition and subtraction facts while practicing how to identify the operation shown by each symbol. The repeated equation format gives students focused practice comparing addition and subtraction and recalling sums and differences. It works well for independent practice, review, or a quick check of fact fluency, and includes a complete answer key for convenient checking.
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WorksheetsAnswer KeyThis Grade 1–2 mathematics worksheet covers solving 15 mixed addition and subtraction equations within 20. Students fill in the numerical answer for each equation, building accuracy with sums and differences while distinguishing between the plus and minus operations.
Introduce the worksheet by reviewing how the plus and minus signs change what students need to find, then model one addition and one subtraction equation from the page. Have students explain whether they are joining quantities or finding a difference before completing the 15 fill-in-the-blank items, and discuss how they checked each answer.
Watch for students solving every item as addition or subtraction without first reading the operation sign. Students may also count inaccurately when finding differences, reverse the numbers in an equation such as 14 − 5, or write an answer that does not match the equation; use the repeated items, including 14 − 6 and 12 + 6, to compare their reasoning.
The worksheet is available as a printable PDF and as a digital quiz on Wayground, so you can choose paper practice or online completion. It includes a complete answer key, and printable submissions can be graded by scanning student work with the Wayground for Teachers app.
In the worksheet’s Advanced Settings, adjust font spacing or increase the font size so the 15 fill-in-the-blank equations provide more room and visual clarity. You can also apply a dyslexia-friendly font to the equation page; translation is available when a translated worksheet version is useful for your learners.
Wayground offers a comprehensive collection of free printable worksheets and practice problems across all subjects, with downloadable PDFs and answer keys to help students master essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.