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

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

**3. 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.**

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

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

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

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

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

**9. 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.**

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

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

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

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

**14. 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.**

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

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

**17. ______________ 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.**

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

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

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

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

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

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

**24. 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.**

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

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

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

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

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

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

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

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

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

**34. The ________ of an angle is the common endpoint of the rays forming the angle.**

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

**50. 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).**