1.1 Integers

123456
Across
  1. 4. ...are the numbers 1, 2, 3, etc., possibly including 0 as well
  2. 5. the numbers that greater than 0
  3. 6. a line that includes all numbers
Down
  1. 1. a mathematical process, such as addition, subtraction, multiplication and division
  2. 2. the numbers that less than 0
  3. 3. opposite in relation to something else