solve the math

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Across
  1. 2. In mathematics a divisor of an integer n is also called this.
  2. 4. 21, 4, 0, and -2048 are examples of what?
  3. 6. decimal 0.25 is an example of what kind of decimal?
  4. 8. decimal 0.3333333333333 is an example of what kind of decimal?
Down
  1. 1. this in graphs can be defined as the system of marks at fixed intervals.
  2. 3. a whole number and proper fraction represented together is called this.
  3. 5. numbers -3/7 is what kind of number?
  4. 7. the product of any quantity and an integer is called this.