Math topics

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Across
  1. 2. One of the most important things in life
  2. 5. Know how much space is used, using this topic
  3. 6. You need to learn this topic so you can divide your pizza equally
  4. 7. Letters are often used in this topic
Down
  1. 1. "Full stops" are often used in this topic
  2. 3. The child of a square/rectangle
  3. 4. Colons are often used in this topic