Operations and Algebraic Thinking: Count On to Add/Subtract CCSS 1.OA.5 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking: Finding the Unknown Number CCSS 1.OA.8 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking: Understanding the Equal Sign CCSS 1.OA.7 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking: Addition and Subtraction within 20 CCSS 1.OA.6 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking: Finding Unknown Addends CCSS 1.OA.4 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking: Properties of Operations CCSS 1.OA.1 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking: Represent and Solve Problems Involving Addition of Three Numbers CCSS 1.OA.2 Facts & Worksheets View Worksheets
Operations and Algebraic Thinking Word Problems: Involving Addition and Subtraction CCSS 1.OA.1 Facts & Worksheets View Worksheets
Numbers and Operations in Base Ten: Adding and Subtracting in Multiples of 10 CCSS 1.NBT.6 Facts & Worksheets View Worksheets
Numbers and Operations in Base Ten: Ten More or Ten Less CCSS 1.NBT.5 Facts & Worksheets View Worksheets
Numbers and Operations in Base Ten: Place Value: Two-Digit Numbers CCSS 1.NBT.2 Facts & Worksheets View Worksheets
Numbers and Operations in Base Ten: Adding within 100 CCSS 1.NBT.4 Facts & Worksheets View Worksheets
Numbers and Operations in Base Ten: Greater than, less than, equal to 1 CCSS 1.NBT.3 Facts & Worksheets View Worksheets