Number bases, decimal system, place value, number puzzle, reflection, addition & subtraction
of integers.
This Cross-Number puzzle involves the use of a novel 'reverse notation' or 'looking glass
arithmetic'. Students should be encouraged to investigate and discover rules for adding and
subtracting digimirror numbers.
A detailed teacher's guide is included which suggests possible classroom approaches. Answers are provided.
My resource 'Digimirror Maths' would be a natural introduction to this activity.
of integers.
This Cross-Number puzzle involves the use of a novel 'reverse notation' or 'looking glass
arithmetic'. Students should be encouraged to investigate and discover rules for adding and
subtracting digimirror numbers.
A detailed teacher's guide is included which suggests possible classroom approaches. Answers are provided.
My resource 'Digimirror Maths' would be a natural introduction to this activity.
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£3.00