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Important Math Facts

Subject : math
  • Answer 50 questions in 15 minutes.
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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. Two angles are ___________ if the sum of their measures is 180°.

2. The symbol ≥ is read as ______________.

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

4. 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.

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

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

8. 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.

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

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

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

12. The symbol ______ means percent.

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

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

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

16. The symbol ≤ is read as __________ .

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

18. The symbol < is read as ________ .

19. Use number lines to ________ two decimals.

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

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

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

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

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

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

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

27. 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.

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

29. The symbol > is read as _________.

30. 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.

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

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

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

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

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

36. A ___________ is a transformation that turns a line or shape around a fixed point.

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

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

39. ______________ 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.

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

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

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

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

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

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

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

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

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

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

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