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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. Use number lines to ________ two decimals.






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






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






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






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






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






7. 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.






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






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






10. The symbol > is read as _________.






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






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






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






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






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






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






17. 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.






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






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






20. Make a __________ of an integer by using its placement on the number line.






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






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






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






24. The symbol ______ means percent.






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






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






27. 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.






28. 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.






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






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






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






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






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






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






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






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






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






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






39. 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).






40. The symbol < is read as ________ .






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






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






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






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






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






46. The set of all possible outcomes is _____________.






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






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






49. The symbol ≥ is read as ______________.






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