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

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

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

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

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

**6. 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.**

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

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

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

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

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

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

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

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

**15. 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.**

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

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

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

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

**20. An approximation of pi is 3.14 - or _______ .**

**21. The symbol < is read as ________ .**

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

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

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

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

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

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

**28. 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.**

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

**45. 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.**

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

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

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

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

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