Grade 2 · Number and Operations in Base Ten

CCSS.MATH.CONTENT.2.NBT.B.8

Mentally add 10 or 100 to a given number 100—900, and mentally subtract 10 or 100 from a given number 100—900.

Read this standard on the official Common Core site

Lessons that teach this standard

• Counting and Skip-Counting to 1,000

  Second grade: count to 1,000, skip-count by 5s, 10s and 100s from any number, and add or subtract 10 or 100 in your head.