Home > Key Stage Two > Maths > Number > Addition > Inverse Operations
Checking Subtraction Sums
This maths teaching pack for Key Stage Two gets the children to explain and model how to check the answers to a range of different subtraction sums by solving addition calculations as the inverse operation using standard written methods.
The class can identify and explain how to use a formal written method to add pairs of numbers with exchange between place value when completing each calculation.
Download this teaching pack including classroom activities and an interactive presentation to explain and model how to check the answers to a range of different subtraction sums by solving addition calculations as the inverse operation using standard written methods
Activities in this teaching pack include a set of differentiated worksheets to practise using addition written methods to check whether subtraction calculations are true or false when working with two digit numbers for support ability levels, three digit numbers for core ability levels and three and four digit numbers for extension ability levels.
The interactive presentation gets the children to explore and record how to check the answers to subtraction sums by using inverse addition calculations.
This lesson is part of a maths scheme of work to get the children to explain and model how to solve subtraction number problems by using addition sums as inverse operations for mental and written methods of calculations. There are teaching activities for shared learning, differentiated worksheets to support independent learning and interactive presentations to introduce concepts and key skills.
-
Ancient History Finds
Explore and illustrate how to use apostrophes for possession to indicate some of the special artefacts that were owned and used in past civilizations
-
Wind Turbine
Plan and write a magazine article about an environmental issue listing arguments in favour of or against the installation of a wind turbine
-
Radio Commercials
Practise using persuasive language to write newspaper adverts and radio commercials to sell houses in the school’s neighbourhood
-
Estate Agent
Investigate and record how to punctuate apostrophes for possession correctly in sentences that might be used by an estate agent when selling houses