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

**2. 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.**

**3. The line or the fold is called the __________ .**

**4. The symbol ______ means percent.**

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

**6. Both addition and multiplication are _________ . This means that order doesnft change the sum or product.**

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

**8. 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.**

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

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

**11. Instead of writing large numbers with all the zeros - you can use _________ . For example - 4 -250 -000 -000 = 4.25 x 10⁹.**

**12. 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.**

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

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

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

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

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

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

**19. The opposite of a positive integer is a ________ .**

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

**21. The symbol > is read as _________.**

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

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

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

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

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

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

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

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

**30. An ________ is a mathematical sentence that contains the equal sign.**

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

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

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

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

**35. An ___________ is a combination of numbers - variables - and operations.**

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

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

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

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

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

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

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

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

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

**45. 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.**

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

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

**48. 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.**

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

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