Math Crossword Puzzle

4. You use this to get a sum.
6. A group
9. You can never divide a number by _____.
10. One fifth and two tenths are _____ fractions.

1. All the sides of a square are _____.
2. Do this to get a quotient.
3. Nine is the square _____ of eighty-one.
5. A whole number
6. You _____ to find the difference between two numbers.
7. You get this when you multiply.
8. It's the percent that equals 1/2.