## 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 to obvious but it re-enforces your understanding as you take the test each time.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

**16. 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.**

**17. 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.**

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

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

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

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

**22. 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).**

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

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

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

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

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

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

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

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

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

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

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

**34. To ___________ - multiply the numerators and then multiply the denominators. Write the product in lowest terms.**

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

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

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

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

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

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

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

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

**43. 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.**

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

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

**46. 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.**

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

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

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

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