Addition and Subtraction Crossword

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Across
  1. 2. 5-2=
  2. 4. 9-3=
  3. 5. 30-29=
  4. 6. 8+12=
Down
  1. 1. 31-22=
  2. 2. 40-38=
  3. 3. 4+4=
  4. 4. 15-9=
  5. 7. 7+3=