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






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






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






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






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






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






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






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






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






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






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






14. 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.






15. The symbol < is read as ________ .






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






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






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






19. 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.






20. A _________ is an equation that shows two ratios are equivalent.






21. 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.






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






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






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






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






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






27. 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).






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






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






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






31. The set of all possible outcomes is _____________.






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






33. The symbol ≤ is read as __________ .






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






35. 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.






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






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






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






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






40. ______________ 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.






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






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






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






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






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






46. The symbol > is read as _________.






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






48. 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.






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






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