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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. 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.






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






3. ______________ 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.






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






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






6. The symbol > is read as _________.






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






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






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






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






11. 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.






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






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






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






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






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






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






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






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






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






21. 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.






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






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






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






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






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






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






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






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






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






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






32. The symbol ≥ is read as ______________.






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






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






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






36. A _____________ is a system used to condense a set of data where the greatest place value of the data forms the stem and next greatest place value forms the leaves.






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






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






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






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






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






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






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






44. The set of all possible outcomes is _____________.






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






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






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






48. 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.






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






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