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.