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Important Math Facts

Subject : math
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 circle is equal to π times its diameter or π times twice its radius. C = π d or C = 2 π r.






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






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






4. 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).






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






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






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






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






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






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






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






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






13. 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.






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






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






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






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






18. ______________ 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.






19. 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.






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






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






22. Use number lines to ________ two decimals.






23. 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.






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






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






26. The symbol ______ means percent.






27. The symbol < is read as ________ .






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






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






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






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






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






33. 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.






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






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






36. 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.






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






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






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






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






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






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






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






44. The symbol ≥ is read as ______________.






45. The symbol ≤ is read as __________ .






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






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






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






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






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