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Smudge's working has one wrong line. Find it, fix it, and tell Smudge why.

Getting ready…

Meet the cast — the characters who teach this

  • Smudge (Hero and the novice you teach, a young hedgehog with chalk on its nose) - works sums line by line and makes the mistakes real learners make; learns each rule when you tell it
  • Tenby An owl who carries - when a column makes ten or more, Tenby carries the ten to the next column
  • Lendle A squirrel who lends - when the top digit is too small, Lendle lends a ten and crosses out so the next column has one less
  • Slotty A mole with a burrow for every digit - ones live under ones and tens under tens, so three tens and four ones make thirty-four

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