Mrs Mactivity

Year 3 Autumn Block 2: Addition and Subtraction

Week 4 Week 5 Week 6 Week 7 Week 8

Autumn Block 2: Addition and Subtraction Within 1000 (Year 3)

Build confidence with Year 3 addition and subtraction within 1000 using this fully resourced maths block, aligned with White Rose Maths and the Year 3 National Curriculum. This unit develops pupils’ understanding of mental and written calculation strategies while strengthening place value knowledge.

Pupils begin by using number bonds, place value knowledge and patterns to add and subtract ones, tens and hundreds. They then apply these skills to calculations that cross tens and hundreds boundaries before progressing to formal written methods of column addition and subtraction.

The block also introduces complements to 100, estimation, inverse operations and efficient problem-solving strategies, helping pupils select appropriate methods and explain their mathematical thinking with confidence.

Weeks 4-8 small steps

  • Use number bonds within 10
  • Add and subtract ones, tens and hundreds
  • Use patterns to add and subtract 1s, 10s and 100s
  • Add ones to a 3-digit number (crossing ten)
  • Add tens to a 3-digit number (crossing 100)
  • Subtract ones from a 3-digit number (crossing ten)
  • Subtract tens from a 3-digit number (crossing 100)
  • Use related facts involving ones, tens and hundreds
  • Add two 2-digit and 3-digit numbers without exchange
  • Subtract two 2-digit and 3-digit numbers without exchange
  • Use column addition with exchanging
  • Use column subtraction with exchanging
  • Add and subtract 2-digit and 3-digit numbers
  • Solve addition and subtraction problems
  • Find complements to 100
  • Estimate answers to calculations
  • Use inverse operations to check answers
  • Choose efficient methods for solving problems

National Curriculum objectives

  • Add and subtract numbers mentally, including a 3-digit number and ones, tens or hundreds
  • Add and subtract numbers with up to three digits using formal written methods
  • Estimate answers and use inverse operations to check calculations
  • Solve problems using number facts, place value and addition and subtraction

Part of Maths Masters

These Year 3 addition and subtraction resources form part of our complete Maths Masters scheme. Explore the full Autumn term sequence for structured progression, interactive teaching slides, differentiated maths activities and assessment opportunities.

Explore Year 3 Autumn Maths

Download our free Year 3 maths yearly overview | Explore maths subject leader resources

Developing addition and subtraction skills in Year 3

This Year 3 addition and subtraction block helps pupils develop efficient mental and written calculation strategies while building confidence with numbers within 1000. Lessons are carefully sequenced to strengthen fluency and mathematical understanding.

Pupils learn to add and subtract ones, tens and hundreds, use related facts and apply formal written methods to increasingly challenging calculations. They also estimate answers, use inverse operations and solve problems that require reasoning and explanation.

What’s included

  • Detailed Year 3 maths lesson plans linked to White Rose Maths
  • Interactive teaching slides with clear modelling and visual representations
  • Differentiated addition and subtraction worksheets for Year 3
  • Reasoning and problem-solving activities
  • Vocabulary prompts and opportunities for mathematical discussion

Aligned with White Rose Maths and the Year 3 National Curriculum, this block supports whole-class teaching, guided practice and independent maths learning.

If you are looking for Year 3 addition and subtraction worksheets, column addition and subtraction activities, Year 3 calculation lesson plans or a complete Year 3 addition and subtraction unit, this block provides the planning, slides and differentiated resources needed to teach the sequence with confidence.