CCSS 3.NBT.2 Worksheets

CCSS 3.NBT.2 (Common Core, 3rd Grade): "Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.