Fractions

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123456
Across
  1. 1. 6/7-2/7
  2. 3. 3/8+4/8-1/8
  3. 4. 2/10+6/10+1/10
  4. 6. 3/4+2/4-1/4+2/4
Down
  1. 2. 1/2+3/8
  2. 3. 3/9+3/9
  3. 5. 7/8+7/8