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






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






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






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






5. 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.






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






7. The symbol > is read as _________.






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






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






10. 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.






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






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






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






14. 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.






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






16. 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.






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






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






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






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






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






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






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






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






25. The symbol < is read as ________ .






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






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






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






29. 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.






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






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






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






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






34. The symbol ≥ is read as ______________.






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






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






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






38. Use number lines to ________ two decimals.






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






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






41. The symbol ≤ is read as __________ .






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






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






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






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






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






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






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






49. The set of all possible outcomes is _____________.






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