Addition and subtraction

  • Prompt Cards
    problem

    Prompt Cards

    Age
    7 to 11
    Challenge level

    These two group activities use mathematical reasoning - one is numerical, one geometric.

  • Exploring Wild & Wonderful Number Patterns
    problem

    Exploring Wild and Wonderful Number Patterns

    Age
    7 to 11
    Challenge level

    EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.

  • Times
    problem

    Times

    Age
    7 to 11
    Challenge level
    Which times on a digital clock have a line of symmetry? Which look the same upside-down? You might like to try this investigation and find out!
  • Sending Cards
    problem

    Sending Cards

    Age
    7 to 11
    Challenge level
    This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?
  • The number 64 and an arrow on a blue metal plate.
    problem

    It's All About 64

    Age
    7 to 11
    Challenge level

    Write the numbers up to 64 in an interesting way so that the shape they make at the end is interesting, different, more exciting ... than just a square.

  • Christmas Shopping
    problem

    Christmas Shopping

    Age
    7 to 11
    Challenge level
    Vera is shopping at a market with these coins in her purse. Which things could she give exactly the right amount for?
  • Calendar Patterns
    problem

    Calendar Patterns

    Age
    7 to 11
    Challenge level
    In this section from a calendar, put a square box around the 1st, 2nd, 8th and 9th. Add all the pairs of numbers. What do you notice about the answers?
  • Super Value Shapes
    problem

    Super Value Shapes

    Age
    7 to 11
    Challenge level
    If each of these three shapes has a value, can you find the totals of the combinations? Perhaps you can use the shapes to make the given totals?
  • A green book.
    problem

    Page Numbers

    Age
    7 to 11
    Challenge level

    Exactly 195 digits have been used to number the pages in a book. How many pages does the book have?

  • Clever Keys
    problem

    Clever Keys

    Age
    7 to 11
    Challenge level
    On a calculator, make 15 by using only the 2 key and any of the four operations keys. How many ways can you find to do it?
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