# Important Math Facts

Subject : math
Instructions:
• Answer 50 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• Match each statement with the correct term.
• Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Together - the x coordinate and y coordinate form an ___________.

2. The symbol ≤ is read as __________ .

3. The ______________ are the numbers of pieces of data that can represent the whole set of data. These common measures of central tendency are mean - median - and mode.

4. A _______ is a comparison of two numbers with different units of measure.

5. Use number lines to ________ two decimals.

6. A _________ has six rectangular faces. To find the surface area - find the sum of the areas of the six faces.

7. The ___________ of a circle is equal to π times its diameter or π times twice its radius. C = π d or C = 2 π r.

8. To add or subtract fractions with unlike denominators - you need to change the fractions to equivalent fractions with ____________ before you find the sum or difference.

9. The ________ is used to represent the ratio of distance on the map to the actual distance.

10. An approximation of pi is 3.14 - or _______ .

11. To express a ______ as a _______ - rewrite the percent as a fraction with a denominator of 100 - and then express the fraction as a decimal.

12. The ____________ of a circle is always a little more than three times the diameter.

13. To ____________ - replace the divisor with its reciprocal and then multiply to get your answer.

14. The symbol < is read as ________ .

15. To ______________ - if the denominators are unlike - write equivalent fractions with a common denominator. Subtract the fractions first - and rename if necessary. Then subtract the whole numbers. Simplify if possible.

16. To _________ - write the mixed numbers as improper fractions. Replace the divisor with its reciprocal and multiply.

17. The line or the fold is called the __________ .

18. When you add or subtract _________ that have the same or like denominators - you only add or subtract the numerators. The denominator stays the same.

19. The symbol ≥ is read as ______________.

20. In a power - the number used as a factor is the base. In 10³ - the ________ is 10. That is - 10³ = 10 X 10 X 10.

21. The __________ of a solid is the total area of its exterior surfaces.

22. The symbol > is read as _________.

23. The set of ________ consists of the positive whole numbers - zero - and the opposites of the positive whole numbers.

24. The ________ of an angle is the common endpoint of the rays forming the angle.

25. A _________ is a symbol - usually a letter - used to represent a number.

26. A ___________ is a transformation that turns a line or shape around a fixed point.

27. Two angles are ___________ if the sum of their measures is 180°.

28. Both addition and multiplication are __________ . This means that grouping addends or factors will not change the sum or product.

29. A _________ is a special kind of bar graph that shows frequency of data.

30. The _________ of a circle is twice the length of the radius.

31. To _____________ - express the mixed numbers as improper fractions - multiply - and simplify the results.

32. A _______ is the comparison of two numbers by division.

33. Similar figures have the same shape but different sizes. The symbol ~ means _________ .

34. The set of all possible outcomes is _____________.

35. The surface area of a __________ is the sum of the areas of two circles and a rectangle.

36. The opposite of a positive integer is a ________ .

37. A figure that can be rotated 180° about a point so that it matches the original figure has ______ .

38. ___________ is a number that can be written using an exponent. For example - 3² means three to the second power.

39. A ___________ is a proportion with one fraction with a denominator of 1.

40. A _________ is a randomly-selected group that is used to represent a whole population.

41. Two angles are ___________ if the sum of their measures is 90°.

42. To __________ an algebraic expression means to substitute a value for the variables and apply the rules for order of operation.

43. The rules to follow when more than one operation is used are called the ___________.

44. A _________ is an equation that shows two ratios are equivalent.

45. Use __________ to compare two decimals - using the order symbols.

46. In a __________ - an object slides from one position to another without changing its size or shape.

47. _________ integers are the same distance from zero in opposite directions on the number line.

48. To add mixed numbers with unlike denominators - write equivalent fractions with a ___________ . Add the whole numbers and add the fractions.

49. A diagram used to show the total number of possible outcomes in a probability experiment is called a _____________.

50. Prime factorization can be written using ________ . For example - 2 x 2 x 3 = 2² x 3