Interactive excel file models counting on to find a difference. Click on the sheet to reveal the questions and steps. Random questions to 200 (so you may get 11-1) which promotes discussion about appropriate strategies. Revealing the answer before the question encourages thinking about inverse operations. Macros will need to be enabled and analysis toolpak required for excel97-2003 version.
Worksheet to practise calculation strategies. Get a whole new set of questions by pressing F9
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Excellent, reusable resource to allow children to develop counting on with the number line when subtracting. Doesn't quite work if the random numbers are multiples of 10, but easy to remedy.
I love this! Thank you.
Thanks a good resource
A really great resource used with Year 5s. Thank you.
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