Math Crossword for Mother

12345678
Across
  1. 2. 105632-7029
  2. 4. 600000000+2000000+12
  3. 7. Round 9605723 to the nearest hundred thousand
  4. 8. 135397+10358208
Down
  1. 1. one million nine hundred thousand three
  2. 3. 603290082-723830
  3. 5. 3000000+9000+7000+2
  4. 6. three thousand thirty two