# mathematics

##### Across
1. 2. is a quantity that may change within the context of a mathematical problem or experiment.
2. 4. the number above the line in a common fraction showing how many of the parts indicated by the denominator are taken, for example, 2 in 2/3.
3. 8. To factor a number means to break it up into numbers that can be multiplied together to get the original number.
4. 10. Number can be divided evenly only by 1, or itself. And it must be a whole number greater than 1.
5. 12. the number below the line in a common fraction; a divisor.
6. 13. two or more non-zero denominators is the smallest whole number that is divisible by each of the denominators.
7. 14. numbers is a real number that cannot be expressed as a ratio of integers, i.e. as a fraction.
8. 15. 2 numbers is the smallest number that they both divide evenly into.
9. 17. says how many times to use that number in a multiplication.
10. 18. expression is a mathematical phrase that can contain ordinary numbers, variables (like x or y) and operators
11. 20. is a squared (multiplied by itself) number subtracted from another squared number