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






2. The symbol ≤ is read as __________ .






3. Use number lines to ________ two decimals.






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






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






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






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






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






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






10. 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.






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






12. 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.






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






14. 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).






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






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






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






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






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






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






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






22. The symbol < is read as ________ .






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






24. The symbol > is read as _________.






25. 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.






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






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






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






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






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






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






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






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






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






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






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






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






38. The set of all possible outcomes is _____________.






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






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






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






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






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






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






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






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






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






48. 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.






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






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