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Add 2-digit and 3-digit Numbers

In this lesson, children will learn how to add and subtract numbers with up to 3 digits, using formal written methods of columnar addition and subtraction. They will learn how to add and subtract multiples of 100; add and subtract 3-digit and 1-digit numbers; and add and subtract numbers with up to 3 digits using a formal written method
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add subtract 3 digit 1 digit numbers
Description

By the end of this unit, students will be able to:

  1. Add and subtract numbers with up to 3 digits, using formal written methods of columnar addition and subtraction;
  2. Add and subtract multiples of 100;
  3. Add and subtract 3-digit and 1-digit numbers;
  4. Add and subtract numbers with up to 3 digits using a formal written method.

Year 3 Number: Addition and Subtraction

  • Add and subtract numbers mentally, including:
    • a three-digit number and 1s
    • a three-digit number and 10s
    • a three-digit number and 100s
  • Add and subtract numbers with up to 3 digits, using formal written methods of columnar addition and subtraction.
  • Age: 7-8
  • England & Wales: Year 3
  • Scotland: Primary 3
  • Rep. Ireland: Second Class
  • Australia: Grade 2
  • USA: Grade 2
  • Three-part Lesson
  • Self-marking Activities
  • Fluency, Reasoning and Problem-solving Questions.
  • Engaging Drag and Drop Activities
  • Interactive Self-marking Worksheet
  • Printable Worksheets to Consolidate Learning

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