Within 20 (A&S)

January 3, 2026

Year 1 Addition and Subtraction within 20 – Block Overview

This overview outlines the lessons in the unit, the resources included and the relevant National Curriculum links for each lesson.... […]
January 3, 2025

Year 1 Addition and Subtraction within 20 – Knowledge Organiser

Child-friendly knowledge organiser covering the year 2 objectives for addition and subtraction....   Hello, Downloads are for members of Grammarsaurus only. […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Add by counting on within 20 – Lesson 1

In this lesson, children will develop their understanding of counting from a given number within 20, starting with the greater […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Add ones using number bonds – Lesson 2

In this lesson, children will learn to use related facts and number bonds as a more e cient method of […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Find and make number bonds to 20 – Lesson 3

In this lesson, children will learn to use their knowledge of number bonds to 10 to find number bonds to […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Doubles – Lesson 4

In this lesson, children will develop their understanding of doubles, learning to add two equal amounts together. This lesson includes […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Near doubles- Lesson 5

In this lesson, children will use their knowledge of doubles to find near doubles, learning that they can add or […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Subtract ones using number bonds – Lesson 6

In this lesson, children will learn to subtract within 20 using their knowledge of number bonds, using concrete resources to […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Subtraction – counting back – Lesson 7

In this lesson, children will learn to subtract by counting back from a given number within 20 and develop an […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Subtraction – finding the difference – Lesson 8

In this lesson, children will learn to subtract by finding the difference between two numbers within 20. They will begin […]
January 5, 2022

Year 1 Addition and Subtraction within 20 – Related facts – Lesson 9

In this lesson, children will develop an understanding of the relationship between addition and subtract facts, finding fact families for […]
January 4, 2022

Year 1 Addition and Subtraction within 20 – Missing number problem – Lesson 10

In this lesson, children will develop their understanding of how to find the answers to missing number problems as they […]
×