Fraction Addition & Subtraction

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