Mental calculations

  • Two red apples.
    problem
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    Fruity Pairs

    Age
    5 to 7
    Challenge level
    1 out of 3

    Which two items of fruit could Kate and Sam choose? What would it cost?

  • Subtraction Slip
    problem
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    Subtraction Slip

    Age
    5 to 7
    Challenge level
    1 out of 3

    Can you spot the mistake in this video? How would you work out the answer to this calculation?

  • Equivalent Pairs
    problem
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    Equivalent Pairs

    Age
    5 to 7
    Challenge level
    1 out of 3

    Can you match pairs of cards which show the same amount?

  • problem
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    Noah

    Age
    5 to 7
    Challenge level
    2 out of 3

    Noah saw 12 legs walk by into the Ark. How many creatures did he see?

  • Number Round Up
    problem
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    Number Round Up

    Age
    5 to 7
    Challenge level
    2 out of 3

    Arrange the numbers 1 to 6 so that the sum of each side of the triangle equals the number in its centre.

  • What's in a Name?
    problem
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    Magic Squares

    Age
    5 to 7
    Challenge level
    2 out of 3

    What do you notice about these squares of numbers? What is the same? What is different?

  • problem
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    Ladybirds in the Garden

    Age
    5 to 7
    Challenge level
    2 out of 3

    There are ladybirds with 7 spots or 4 spots in this garden. What numbers of total spots can you make?

  • The Tall Tower
    problem
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    The Tall Tower

    Age
    5 to 7
    Challenge level
    2 out of 3

    As you come down the ladders of the Tall Tower you collect useful spells. How many can you collect?

  • Finding Fifteen
    problem
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    Finding Fifteen

    Age
    5 to 7
    Challenge level
    2 out of 3

    Tim had nine cards. How could he have put them into three piles so that the total in each pile was 15?