Mathematics Crossword

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Across
  1. 4. 82x74
  2. 6. 80x41 divided by 4x56-67=5000x90 divided by 2=
Down
  1. 1. 9+4+1+5+6+7+5+3=
  2. 2. 16x3
  3. 3. 6!=
  4. 4. 7x9-63+42-2+23=
  5. 5. half of 122=
  6. 7. 8x9x725=