the rapid recall of number facts
Difference and Product
Two small decimals
small numbers are generated, their sum, difference and product are
Hide the two numbers, can you work out what they are from their sum,
product and difference?
Click on 'change' to generate two more numbers.
Hide the product, work out the two numbers from their sum and difference.
odd or even labels: is it possible to say whether a sum, product or
difference will be odd or even?
Doubles and halves
Powers and roots
Highest common factor
Lowest common multiple
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