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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 transformation that turns a line or shape around a fixed point.






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






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






4. 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.






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






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






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






8. The symbol ≤ is read as __________ .






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






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






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






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






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






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






15. The symbol < is read as ________ .






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






17. 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).






18. Use number lines to ________ two decimals.






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






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






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






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






23. The symbol ≥ is read as ______________.






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






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






26. The symbol > is read as _________.






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






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






29. 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.






30. ______________ 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.






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






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






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






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






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






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






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






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






39. 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.






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






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






42. The set of all possible outcomes is _____________.






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






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






45. The symbol ______ means percent.






46. The ________ of an angle is the common endpoint of the rays forming the angle.






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






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






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






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