Positive and negative numbers

  • Pair Sums
    problem

    Pair sums

    Age
    11 to 14
    Challenge level
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    Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?
  • Consecutive Numbers
    problem

    Consecutive numbers

    Age
    7 to 14
    Challenge level
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    An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

  • Positive About Negative Numbers
    article

    Positive about negative numbers

    In this article for teachers, Liz Woodham describes resources on NRICH that can help primary-aged children get to grips with negative numbers.
  • Negative Numbers
    article

    Negative numbers

    A brief history of negative numbers throughout the ages
  • Number Lines in Disguise
    problem

    Number lines in disguise

    Age
    7 to 14
    Challenge level
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    Some of the numbers have fallen off Becky's number line. Can you figure out what they were?