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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 always a little more than three times the diameter.






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






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






4. 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.






5. The symbol ______ means percent.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






20. The symbol > is read as _________.






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






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






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






25. 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.






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






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






28. Use number lines to ________ two decimals.






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






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






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






32. The symbol ≤ is read as __________ .






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






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






35. The set of all possible outcomes is _____________.






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






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






38. 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.






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






40. ______________ 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.






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






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






43. The symbol ≥ is read as ______________.






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






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






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






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






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






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






50. 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.