Addition and subtraction

  • Interactive Balance
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    Interactive Balance

    Age
    5 to 11
    Challenge level
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    In this simulation of a balance, you can drag numbers and parts of number sentences on to the trays. Have a play!

  • Five Coins
    problem
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    Five Coins

    Age
    5 to 11
    Challenge level
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    Ben has five coins in his pocket. How much money might he have?

  • problem
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    The Puzzling Sweet Shop

    Age
    5 to 11
    Challenge level
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    There were cola bottles for 2p, mini eggs for 3p, marshmallow twists for 5p and lollipops for 7p in the sweet shop. What could each of the children buy with their money?

  • Make 37 Poster
    problem
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    Make 37

    Age
    5 to 11
    Challenge level
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    Four bags contain a large number of 1s, 3s, 5s and 7s. Can you pick ten numbers from the bags so that their total is 37?

  • 4 Dom
    problem
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    4 Dom

    Age
    5 to 11
    Challenge level
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    Use these four dominoes to make a square that has the same number of dots on each side.

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    Plants

    Age
    5 to 14
    Challenge level
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    Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?

  • Build it up
    problem
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    Build It Up

    Age
    7 to 11
    Challenge level
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    Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.

  • Dicey Operations in Line
    game
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    Dicey Operations in Line

    Age
    7 to 11
    Challenge level
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    In these addition, subtraction, multiplication and division games, you'll need to think strategically to get closest to the target.

  • Doplication
    problem
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    Doplication

    Age
    7 to 11
    Challenge level
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    We can arrange dots in a similar way to the 5 on a dice and they usually sit quite well into a rectangular shape. How many altogether in this 3 by 5? What happens for other sizes?

  • Buying a Balloon
    problem
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    Buying a Balloon

    Age
    7 to 11
    Challenge level
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    Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?