Addition Crossword

12345678
Across
  1. 1. four plus two (4+2=_)
  2. 2. six plus three (6+3=_)
  3. 3. five plus five (5+5=_)
  4. 5. one plus one (1+1=_)
  5. 7. three plus two (3+2=_)
  6. 8. two plus one (2+1=_)
Down
  1. 1. five plus two (5+2=_)
  2. 4. three plus five (3+5=_)
  3. 6. one plus zero (1+0=_)
  4. 7. one plus three (1+3=_)