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






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






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






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






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






6. The symbol ≥ is read as ______________.






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






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






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






10. 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).






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






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






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






14. The symbol ≤ is read as __________ .






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






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






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






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






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






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






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






22. 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.






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






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






25. The _________ of an integer is the distance of the integer from zero.






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






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






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






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






30. 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.






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






32. 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.






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






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






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






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






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






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






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






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






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






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






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






44. The set of all possible outcomes is _____________.






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






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






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






48. 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.






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






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