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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. ______________ 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.






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






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






4. The set of all possible outcomes is _____________.






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






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






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






8. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






25. 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.






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






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






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






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






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






31. Use number lines to ________ two decimals.






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






33. The symbol ≤ is read as __________ .






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






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






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






37. The symbol < is read as ________ .






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






39. 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.






40. 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.






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






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






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






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






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






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






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






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






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






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