MaTh CrOsSwOrD pUzZlE

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Across
  1. 2. something that keeps going
  2. 5. the opposite of addition
  3. 7. the opposite of subtraction
  4. 8. the opposite of multiplication
  5. 10. to help find the constant
  6. 11. up and down
Down
  1. 1. equal
  2. 2. a number to another number
  3. 3. side to side
  4. 4. to add faster
  5. 6. to learn numbers
  6. 9. one is acute