Maths : Subtraction of decimals

Written subtraction of decimals
Recap method
Importance of column alignment to preserve place value
Using placeholders when doing calculations involving decimals to
differing numbers of places eg 3.01 - 2.1
recap disolving top line and that the largest numbershould be on top
in the sum ( we are notconsidering negative numbers.
Calculation of price differences by subtraction
Practice from NHM6 pp 53