CCSS 2.NBT.B.8 Worksheets
Grade 2 · Number & Operations in Base Ten
Mentally add or subtract ten or a hundred from a number between 100 and 900.
Below are free printable worksheets that support 2.NBT.B.8. Print them as PDFs, or generate a fresh one. Every math answer key is computed in code, so it is never wrong.
Teaching guide
What students learn
Mentally add or subtract ten or a hundred from a number between 100 and 900.
How to teach it
Start by counting on from the larger number, then move to partitioning into tens and ones and adding each part, and finally column addition with regrouping.
Worked example
2 + 1 =
Answer: 3
Generated and checked in code, so it is correct.
Watch out for
Adding the tens and ones columns without carrying the regrouped ten, and always counting on from the first number rather than the larger.
Addition worksheets
All addition worksheets →Subtraction worksheets
All subtraction worksheets →Pre-K Subtraction
Set A · printable PDF · answer key
Pre-K Subtraction
Set B · printable PDF · answer key
Pre-K Subtraction
Set C · printable PDF · answer key
Pre-K Subtraction
Set D · printable PDF · answer key
Pre-K Subtraction
Set E · printable PDF · answer key
Pre-K Subtraction
Set F · printable PDF · answer key
Place Value worksheets
All place value worksheets →Grade 2 Place Value
Set A · printable PDF · answer key
Grade 2 Place Value
Set B · printable PDF · answer key
Grade 2 Place Value
Set C · printable PDF · answer key
Grade 2 Place Value
Set D · printable PDF · answer key
Grade 2 Place Value
Set E · printable PDF · answer key
Grade 2 Place Value
Set F · printable PDF · answer key