SimplyTheStandards

This bundle combines the 2 resources for 1.OA.B (1.OA.B.3 and 1.OA.B.4), which focuses on understanding and applying properties of operations and the relationship between addition and subtraction. For each standard, you will get a description of the different levels of understanding and worksheets for each level!

Use these worksheets to help students develop and deepen their understanding of adding and subtracting within 20 using strategies such as counting on, counting back, making 10, related known facts, and composing/decomposing numbers with an emphasis on making ten

Use these worksheets to help students develop and deepen their understanding of the relationship between addition and subtraction by representing subtraction as an unknown-addend problem.

This resource contains all the possible addition and subtraction facts within 20! The facts in yellow are within 10. Use this to help you keep track of your students' fluency progress! The font is small enough for the facts to fit on one page, but feel free to enlarge it to see the facts better.