Add & Subtract 3-Digit Numbers: Formal Written Methods With/Without Regrouping – UK Primary Maths

This set of no frills worksheets provides an (almost) endless source of practicing column addition and subtraction of two, three or four 3-Digit numbers, differentiated to help introduce regrouping using the formal method. This topic is part of the Year 3 and Year 4 curriculum for mathematics, focusing on addition and subtraction of numbers up to 1000 using formal written methods, including columnar addition and subtraction, with and without regrouping. It is found under the “Number – addition and subtraction” sections, supporting pupils to become fluent in using algorithms and understanding place value.

The first set of worksheets has adding & subtracting a 2-digit number from a 3-digit number can serve as a useful interim step between adding & subtracting 2-digit numbers and adding & subtracting 3-digit numbers. It helps bridge the gap between these two levels of difficulty and provides a valuable transition in the learning process.

 Add a 3-Digit and a 2-Digit number & Subtract a 2-Digit from a 3-Digit number

This preliminary set of worksheets serves as a useful interim step between adding & subtracting 2-digit numbers and adding & subtracting 3-digit numbers. It helps bridge the gap between these two levels of difficulty and provides a valuable transition in the learning process.

• No regrouping
• Regrouping I – Units only
• Regrouping II -Units and tens

Add two 3-Digit numbers

• Regrouping I – Units only
• Regrouping II -Units and tens
• Regrouping III -Units, tens and hundreds

Add more than two 3-Digit numbers

• Adding three 3-Digit numbers
• Adding four 3-Digit numbers

 Subtraction with two 3-Digit numbers

• No regrouping
• Regrouping I – Units only
• Regrouping II – Units and tens

All the sets worksheets listed above come in 2 formats

1. The questions are laid out ready to work on with the numbers in the vertical format and the answer line ready to fill in.
2. The questions are presented in the horizontal format so that your students have to properly align the digits based on their place values, which is essential for accurate addition & subtraction. This practice reinforces the concept of place value and helps students develop a better understanding of how digits in different positions represent different values.

Virtually Unlimited Worksheets at the click of a button: Download one of the following Freebies on my store Jeff’s Notebooks  and see for yourself how they work

• Divide 3-Digit by 1-Digit Numbers (With/Without Remainders) FREEBIE
• Order of operations without Exponents FREEBIE
• Compare & Order Numbers to 100: Place Value Activities for Year 2 Maths FREEBIE

These are straightforward no-prep worksheets that require no extra work. Simply CLICK-PRINT AND GO. This makes them ideal to have printed and ready for a replacement teacher if needed. 

Answers are automatically generated every time.

Note: These resources work with the official Adobe Acrobat Reader on Windows or Mac computers.

UK National Curriculum – Key Stage 2- 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