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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. 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.






2. The set of all possible outcomes is _____________.






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






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






5. The symbol < is read as ________ .






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






7. 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.






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






9. The symbol ≤ is read as __________ .






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






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






12. 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.






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






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






15. ______________ 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.






16. The symbol ≥ is read as ______________.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






33. 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.






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






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






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






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






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






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






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






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






43. The symbol ______ means percent.






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






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






46. 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).






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






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






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






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