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






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






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






4. 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.






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






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






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






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






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






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






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






12. 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.






13. 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.






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






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






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






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






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






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






20. ______________ 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.






21. The symbol < is read as ________ .






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






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






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






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






26. The symbol ______ means percent.






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






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






29. The symbol ≤ is read as __________ .






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






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






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






33. The symbol > is read as _________.






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






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






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






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






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






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






40. The symbol ≥ is read as ______________.






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






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






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






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






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






46. Use number lines to ________ two decimals.






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






48. 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.






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






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