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






2. ______________ 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.






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






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






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






7. Similar figures have the same shape but different sizes. The symbol ~ means _________ .






8. 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.






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






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






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






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






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






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






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






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






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






18. 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.






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






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






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






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






23. The symbol < is read as ________ .






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






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






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






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






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






29. The symbol ≥ is read as ______________.






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






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






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






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






34. The symbol ______ means percent.






35. 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.






36. The set of all possible outcomes is _____________.






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






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






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






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






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






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






43. Use number lines to ________ two decimals.






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






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






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






47. 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.






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






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






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