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Important Math Facts

Subject : math
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 circle is always a little more than three times the diameter.

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

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

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

5. The symbol ≤ is read as __________ .

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

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

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

9. 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.

10. 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.

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

12. 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.

13. A _______ is a ratio that compares a number to 100.

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

15. The set of all possible outcomes is _____________.

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

17. 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.

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

19. Use number lines to ________ two decimals.

20. The symbol ≥ is read as ______________.

21. 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.

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

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

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

25. The opposite of a positive integer is a ________ .

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

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

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

29. ______________ 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.

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

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

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

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

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

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

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

37. The symbol < is read as ________ .

38. An approximation of pi is 3.14 - or _______ .

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

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

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

42. 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.

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

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

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

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

47. Both addition and multiplication are _________ . This means that order doesnft change the sum or product.

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

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

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