## Test your basic knowledge |

# Important Math Facts

**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**