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






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






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






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






5. 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.






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






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






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






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






10. The symbol ≤ is read as __________ .






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






12. 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).






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






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






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






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






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






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






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






20. 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.






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






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






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






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






25. ______________ 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.






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






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






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






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






30. The symbol > is read as _________.






31. The symbol ≥ is read as ______________.






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






33. 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.






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






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






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






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






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






39. The symbol ______ means percent.






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






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






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






43. 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.






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






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






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






47. The symbol < is read as ________ .






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






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






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