Grade 2 · Number and Operations in Base Ten

CCSS.MATH.CONTENT.2.NBT.B.6

Add up to four two-digit numbers using strategies based on place value and properties of operations.

Read this standard on the official Common Core site

Lessons that teach this standard

• Adding and Subtracting Within 100

  Grade 2: add and subtract within 100 with place value — tens with tens and ones with ones, making a ten, counting up — add up to four numbers, and explain why it works.