3 Digit Addition and Subtraction, With and Without Regrouping

There are 10 sets of Worksheets providing an excellent straightforward resource for practicing column addition and subtraction of 3 Digit numbers, differentiated with and without regrouping applying the standard algorithm.

They are organized in such a way that your students can develop their proficiency one step at a time, beginning with no regrouping, then bringing in regrouping in easy stages until they are ready to add up three or four 3-digit numbers with regrouping with units, tens and hundreds. 

Addition 

• No regrouping 

• Regrouping  I - Units only

• Regrouping II - Units and tens

• Regrouping III -Units, tens and hundreds

• Adding three 3 Digit numbers

• Adding four 3 Digit numbers

Subtraction 

• No regrouping

• Regrouping I - Units only

• Regrouping II - Units and tens, 2nd number is a 2-Digit number

• Regrouping III - Units and tens

Answers can be found on the second page of every worksheet and they are automatically generated when you create a new worksheet.

How many worksheets are in each set ?

Almost unlimited.  At the click of a button all the numbers are randomised, so the questions change every time.  This will allow you to create as many new worksheets you will need for practice throughout the year (classwork, homework, revision, fillers etc) or even give small groups of students in your class different sets of questions either at the same or different levels. Print out as many unique worksheets as you need. Your students will never run short of practice.

As these sheets need little explanation, they are ideal if you need to leave work for a replacement teacher.

Note
These resources are PDF documents and work with the official  Adobe Acrobat Reader on Windows or Mac computers with the randomising buttons also working via a touchscreen (PC or Mac)or on an Interactive Whiteboard.

Common Core Standards 3rd and 4th Grade
CCSS3.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.

CCSS4.NBT.B.4
Fluently add and subtract multi-digit whole numbers using the standard algorithm

UK National Curriculum. Year 3 Programme of Study:
Number - Addition and Subtraction
Add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction

Need a refresher with 2-Digit numbers ?
Try this: Add and Subtract 2-digit numbers with and without regrouping 2nd Grade

For more challenging exercises: Add and Subtract 4 and 5 digit whole numbers using the standard algorithm

Extend the subtraction practice with these four-digit regrouping worksheets when students are ready.