Addition and subtraction

  • Strike it out
    problem

    Strike it out

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

  • It was 2010!
    problem

    It was 2010!

    Age
    5 to 11
    Challenge level
    filled star empty star empty star
    If the answer's 2010, what could the question be?
  • Sorting the Numbers
    problem

    Sorting the numbers

    Age
    5 to 11
    Challenge level
    filled star empty star empty star
    Complete these two jigsaws then put one on top of the other. What happens when you add the 'touching' numbers? What happens when you change the position of the jigsaws?
  • Sitting round the party tables
    problem

    Sitting round the party tables

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.

  • Dotty Six
    problem

    Dotty six

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    Dotty Six is a simple dice game that you can adapt in many ways.

  • Dicey Addition
    problem

    Dicey addition

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    In these addition games, you'll need to think strategically to get closest to the target.

  • Half Time
    problem

    Half time

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    What could the half time scores have been in these Olympic hockey matches?

  • How do you see it?
    problem

    How do you see it?

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    Here are some short problems for you to try. Talk to your friends about how you work them out.

  • Ordering cards
    problem

    Ordering cards

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    This problem is designed to help children to learn, and to use, the two and three times tables.

  • Doing and undoing
    problem

    Doing and undoing

    Age
    5 to 11
    Challenge level
    filled star empty star empty star

    An investigation looking at doing and undoing mathematical operations focusing on doubling, halving, adding and subtracting.