PEMDAS Crossword Puzzle

123456
Across
  1. 5. Repeated Addition
  2. 6. Taking away a number from another number
Down
  1. 1. An order of operations
  2. 2. Merging a number to another number
  3. 3. Multiplying the same number to itself for certain amount of times
  4. 4. Finding how many can go into the whole