Addition and subtraction within 20

This unit builds on children’s understanding of addition and subtraction, as well as on their knowledge of numbers to 20. It requires children to understand how numbers can be split apart into number bonds and fact families, and how to represent numbers using manipulatives, as well as on number lines and number tracks

Assessing Mastery: 

Children who have mastered this unit will be able to use different strategies for adding and subtracting numbers within 20, choosing an appropriate method dependent on the numbers in the calculation. They will be able to use representations of ten frames, bead strings and number lines to explain different methods for adding and subtracting numbers up to 20. Children will use their knowledge of addition and subtraction to correctly interpret word problems and explain their solutions using the correct mathematical language.

Key vocabulary:

We will need some maths words. Have you heard any of these before? 

add altogether, subtract, difference, left, fewer, fact family, number bonds,