Integer Addition and Subtraction 9 - 11 : How Many Ways?

The SATs arithmetic paper presents 36 questions to be completed in 30 minutes. Pupils therefore need to work efficiently and confidently. This PowerPoint focuses on working efficiently.
45 interactive slides each containing 4 cards that are flipped to reveal a calculation.
Printables and answers are included to minimise preparation time.
Each slide has accompanying notes to assist busy teachers with suggested methods for each calculation. 
Using standard algorithms isn’t always the most efficient way to calculate an answer. The mark scheme does not require a particular method for any question but for those involving long multiplication and long/short division, an error in the answer can be awarded one mark if there is only one error and pupils have used the formal algorithm.
Allowing pupils to discuss their methods reminds pupils about the most efficient ways to calculate different questions.
Although pupils don’t always need to use formal algorithms that doesn’t mean that they need to calculate everything in their heads; informal jottings and the use of a number line can be very helpful for pupils.
When working with larger numbers, it can be more efficient to use the standard algorithms. However, whichever method pupils use, it is worth getting them used to using an estimate to check their answer against.