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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 a symbol - usually a letter - used to represent a number.






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






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






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






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






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






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






8. The symbol > is read as _________.






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






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






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






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






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






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






15. 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.






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






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






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






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






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






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






22. The symbol ______ means percent.






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






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






25. Use number lines to ________ two decimals.






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






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






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






29. ______________ 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.






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






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






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






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






34. 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).






35. The set of all possible outcomes is _____________.






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






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






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






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






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






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






42. The symbol ≥ is read as ______________.






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






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






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






46. 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.






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






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






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






50. 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.