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

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

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

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

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

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

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

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

9. 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).

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

11. 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.

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

13. 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.

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

15. 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.

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

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

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

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

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

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

22. 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.

23. 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.

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

25. The symbol ≥ is read as ______________.

26. The symbol < is read as ________ .

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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