One more, one less is a great method for familiarising children with adding and subtracting numbers before they move on to more complicated sums.
Chopper squad gameCan you rescue the people by finding one more and one less of numbers up to 100? Why not try 10 more and 10 less? Can you see a pattern between 1 more and 10 more or 1 less and 10 less?
Try these challenge cards - can you make your own?