A Trip Down Mathmory Lane

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Across
  1. 4. Repeated subtraction / the hardest of the four operations
  2. 5. A type of quadrilateral
  3. 7. A type of angle
  4. 10. Another word for "plus"
  5. 11. Repeated addition / also known as "times"
Down
  1. 1. A type of triangle
  2. 2. Another word for "subtract"
  3. 3. This is what we get when dividing a whole into various parts
  4. 6. When ________ to the nearest ten I write 342 as 340 or 87 as 90.
  5. 8. When writing 5/10 (five tenths) as 0.5 you write it as a ________.
  6. 9. A part of a line.