# Important Math Facts

Subject : math
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 ________ is used to represent the ratio of distance on the map to the actual distance.

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

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

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

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

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

7. The _________ of a circle is twice the length of the radius.

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

9. The line or the fold is called the __________ .

10. Together - the x coordinate and y coordinate form an ___________.

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

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. An approximation of pi is 3.14 - or _______ .

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

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

16. 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).

17. Use number lines to ________ two decimals.

18. The _________ of an integer is the distance of the integer from zero.

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

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

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

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

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

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

25. 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.

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

27. 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.

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

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

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

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

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

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

34. 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.

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

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

37. 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.

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

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

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

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

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

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

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

45. The symbol ≥ is read as ______________.

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

47. ______________ 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.

48. The symbol > is read as _________.

49. The symbol ______ means percent.

50. A _______ is the comparison of two numbers by division.