Grade 3 · Number and Operations in Base Ten

CCSS.MATH.CONTENT.3.NBT.A.2

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.

Read this standard on the official Common Core site

Lessons that teach this standard

• Adding and Subtracting Large Numbers

  How to add and subtract multi-digit numbers in columns, what carrying and borrowing actually do, and how to check an answer by estimating or by working backwards.