MATHS THINKING TIME

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Across
  1. 1. when at least one of them is not zero, is the largest positive integer that divides the numbers without a remainder
  2. 6. A decimal number that continues infinitely, or without end.
  3. 10. method solving systems of equations is also called the addition method. To solve a system of equations by elimination we transform the system such that one variable "cancels out".
  4. 11. is the smallest positive integer that is divisible by both a and b
  5. 12. method used to eliminate one of the variables by replacement when solving a system of equations.
  6. 14. methods with a mathematical basis. Included are diagram techniques, chart techniques, plot techniques, and other forms of visualization.
  7. 15. The zero and the counting numbers make up the set of whole numbers.
  8. 16. number is a possibly complex number that is a root of a finite, non-zero polynomial in one variable with rational coefficients
  9. 17. number any number that can be expressed as the quotient or fraction p/q of two integers, p and q, with the denominator q not equal to zero
  10. 19. is any real number that cannot be expressed as a ratio of integers
  11. 21. an equality containing one or more variables
Down
  1. 2. number is a positive integer that has at least one positive divisor other than one or the number itself
  2. 3. number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself
  3. 4. theorem of arithmetic also called the unique factorization theorem or the unique-prime-factorization theorem, is prime itself or is the product of prime numbers, and that this product is unique, up to the order of the factors.
  4. 5. given an equation between two fractions or rational expressions, one can ........................ to simplify the equation or determine the value of a variable.
  5. 7. number is a natural number greater than 1 that has no positive divisors other than 1 and itself
  6. 8. A decimal number that has digits that do not go on forever.
  7. 9. line when two expressions show a near-equality which has no theoretical explanation.
  8. 13. line
  9. 18. is a proven proposition which is used as a stepping stone to a larger result rather than as a statement of interest by itself.
  10. 20. is a procedure or formula for solving a problem.