• Mastery PD Materials

Spine 1: Number, Addition and Subtraction – Topic 1.25

### Introduction

Building on segments 1.23 and 1.24, introduce children to conventions for expressing monetary value and explore the equivalence of 100 p and £1; encourage children to select column algorithms or equivalent calculations where most appropriate.

### Teaching points

• Teaching point 1: One penny is one hundredth of a pound; conventions for expressing quantities of money are based on expressing numbers with tenths and hundredths.

• Teaching point 2: Equivalent calculation strategies for addition can be used to efficiently add commonly-used prices.

• Teaching point 3: The ‘working forwards’/‘finding the difference’ strategy for subtraction is an efficient way to calculate the change due when paying in whole pounds or notes.

• Teaching point 4: Column methods can be used to add and subtract quantities of money.

• Teaching point 5: Finding change when purchasing several items uses the part–part–(part–)whole structure.

• Primary
• KS2
• Year 4