MATHEMATICS CROSSWORD

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Across
  1. 3. 4+4=
  2. 5. 18+47=
  3. 6. 6+3=
  4. 7. 36+27=
Down
  1. 1. 9+8=
  2. 2. 39+46=
  3. 4. 64+28=
  4. 8. 25+15=