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

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

3. 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).

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

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

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

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

8. The set of all possible outcomes is _____________.

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

10. The symbol ≤ is read as __________ .

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

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

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

14. 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.

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

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

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

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

19. The symbol > is read as _________.

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

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

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

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

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

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

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

27. 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.

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

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

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

31. 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.

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

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

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

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

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

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

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

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

40. 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.

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

42. 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.

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

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

45. 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.

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

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

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

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

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