Medical Math Mini Crossword

123456
Across
  1. 4. Citizens who used letters for numerals
  2. 5. Accurate measurement system used in healthcare
  3. 6. System that uses "lbs"
Down
  1. 1. Numbers with no fractions or decimals
  2. 2. "Needy" scientist
  3. 3. 1:10 bleach to water, for example