Additive Reasoning and Mental Strategies · Operations

Column Addition and Subtraction

Introducing formal written methods and the concept of regrouping or exchanging.

Key Questions

  1. 1What is actually happening to the value of the numbers when we carry a ten into the next column?
  2. 2How can we use the inverse operation to check if our calculation is correct?
  3. 3When is a written method more reliable than a mental strategy?

National Curriculum Attainment Targets

KS2: Mathematics - Addition and Subtraction
Year: Year 3
Subject: Mathematics
Unit: Additive Reasoning and Mental Strategies
Period: Operations

Suggested Methodologies

Ready to teach this topic?

Generate a complete, classroom-ready active learning mission in seconds.

Generate a Custom MissionBrowse Lesson Plan Templates

More in Additive Reasoning and Mental Strategies

Mental Calculation Mastery

Using known facts to derive new ones and manipulating numbers mentally for speed and accuracy.

2 methodologies

Solving Complex Word Problems

Applying addition and subtraction to multi step scenarios involving real world contexts.

2 methodologies

Browse curriculum by country

AmericasUSCAMXCLCOBR
EuropeUKIEFRDEESITNLPTSE
Asia & PacificINSGAU