INTEGERS

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Across
  1. 3. a + b = b + a is called .... property under addition
  2. 4. All natural numbers together zero....
  3. 6. a x (1/a) = 1 is called ... property
  4. 8. Product of two negative integers....
  5. 9. ax(bxc) = (axb)xc is called... property under multiplication
  6. 10. If a + 0 = a = 0 + a then 0 is called...
  7. 13. The numbers denoted by letter z are called....
Down
  1. 1. All counting numbers are called....
  2. 2. a + (-a) = 0 is called ... property
  3. 5. If a × 1 = a = 1 × a then 1 is called....
  4. 7. 2×23×46×0=....
  5. 11. a x (b + c) = a x b + a x c is called... property
  6. 12. Sum of two negative integers....