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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 symbol ≤ is read as __________ .

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

3. 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.

4. 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.

5. The set of all possible outcomes is _____________.

6. 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.

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

8. Use number lines to ________ two decimals.

9. The symbol < is read as ________ .

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

11. 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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

33. The symbol > is read as _________.

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

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

36. 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.

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

38. ______________ 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.

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

40. The symbol ______ means percent.

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

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

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

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

45. The symbol ≥ is read as ______________.

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

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

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

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

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