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There are 5 NRICH Mathematical resources connected to NC-MentalCalculationAS-R1-Y2, you may find related items under NC.
Broad Topics > NC > NC-MentalCalculationAS-R1-Y2Can you spot the mistake in this video? How would you work out the answer to this calculation?
Order these four calculations from easiest to hardest. How did you decide?
This challenge is about finding the difference between numbers which have the same tens digit.
In this problem it is not the squares that jump, you do the jumping! The idea is to go round the track in as few jumps as possible.