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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. 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.

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

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

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

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

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

7. 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.

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

9. The symbol < is read as ________ .

10. 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.

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

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

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

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

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

16. 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.

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

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

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

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

21. 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.

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

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

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

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

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

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

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

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

30. 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).

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

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

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

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

35. ______________ 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.

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

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

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

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

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

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

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

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

45. The symbol ≤ is read as __________ .

46. 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.

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

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

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

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