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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






17. Use number lines to ________ two decimals.






18. 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.






19. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






33. 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.






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






35. The symbol ≥ is read as ______________.






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






37. The symbol ______ means percent.






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






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






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






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






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






43. 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.






44. 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).






45. The symbol < is read as ________ .






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






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






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






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






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