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

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

3. 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.

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

5. Use number lines to ________ two decimals.

6. The symbol > is read as _________.

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

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

9. 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.

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

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

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

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

14. 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.

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

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

17. ______________ 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.

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

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

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

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

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

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

24. 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.

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

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

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

28. The symbol ≤ is read as __________ .

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

46. The set of all possible outcomes is _____________.

47. The symbol < is read as ________ .

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

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

50. 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).