Decimals

  • Round the Dice Decimals 2
    problem
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    Round the Dice Decimals 2

    Age
    7 to 11
    Challenge level
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    What happens when you round these numbers to the nearest whole number?

  • Round the Dice Decimals 1
    problem
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    Round the Dice Decimals 1

    Age
    7 to 11
    Challenge level
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    Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?

  • Forgot the Numbers
    problem
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    Forgot the Numbers

    Age
    7 to 11
    Challenge level
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    On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?

  • Route Product
    problem
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    Route Product

    Age
    7 to 11
    Challenge level
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    Find the product of the numbers on the routes from A to B. Which route has the smallest product? Which the largest?

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    Doughnut Percents

    Age
    7 to 14
    Challenge level
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    Can you make doughnuts by matching these fractions, decimals and percentages?

  • Spiralling Decimals
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    Spiralling Decimals

    Age
    7 to 14
    Challenge level
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    Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?

  • Round and round and round
    problem
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    Round and Round and Round

    Age
    11 to 14
    Challenge level
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    Where will the point stop after it has turned through 30 000 degrees? I took out my calculator and typed 30 000 ÷ 360. How did this help?

  • Terminating or not
    problem
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    Terminating or Not

    Age
    11 to 14
    Challenge level
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    Is there a quick way to work out whether a fraction terminates or recurs when you write it as a decimal?

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    Shopping Basket

    Age
    11 to 16
    Challenge level
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    The items in the shopping basket add and multiply to give the same amount. What could their prices be?