## 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. An _________ is a mathematical sentence that contains < - > - - ≤ - or ≥ .**

**2. If a figure can be divided in half by a line so that the two halves match each other - the figure is __________ .**

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

**4. Together - the x coordinate and y coordinate form an ___________.**

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

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

**7. Make a __________ of an integer by using its placement on the number line.**

**8. _________ - _________ - and_______may be written by first writing each one as a fraction with a denominator of 100.**

**9. The set of all possible outcomes is _____________.**

**10. The symbol ______ means percent.**

**11. The _________ states that multiplying a sum by a number is the same as multiplying each addend by that number and then adding the two products. For example - 3(8 + 2) = (3 x 8) + (3 x 2).**

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

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

**14. In a__________ - an object flips over a line without changing its size or shape.**

**15. The _________ of a circle is twice the length of the radius.**

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

**17. A _____________ is a system used to condense a set of data where the greatest place value of the data forms the stem and next greatest place value forms the leaves.**

**18. To express a ______ as ________a - express the percent as a fraction with a denominator of 100 - then simplify.**

**19. 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.**

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

**21. To add ____________ with common denominators - write the sum of the numerators over the common denominators. Then add the whole numbers.**

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

**23. The _________ of an integer is the distance of the integer from zero.**

**24. ______________ are two events in which either one or the other must take place - but they cannot both happen at the same time. The sum of their probabilities is one.**

**25. A _______ is a ratio that compares a number to 100.**

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

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

**28. In a power - the number of times the base is used as a factor is the ________ . In 5³ - the exponent is 3.**

**29. The symbol ≤ is read as __________ .**

**30. 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.**

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

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

**33. A ___________is for organizing a set of data that shows the number of times each item or number appears.**

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

**35. 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.**

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

**37. A _______ is the comparison of two numbers by division.**

**38. The symbol ≥ is read as ______________.**

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

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

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

**42. Use number lines to ________ two decimals.**

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

**44. 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.**

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

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

**47. 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.**

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

**49. When two or more numbers are multiplied - each number is called a _________ .**

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