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






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






3. The symbol < is read as ________ .






4. 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.






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






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






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






8. ______________ 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.






9. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






23. The symbol ______ means percent.






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






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






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






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






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






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






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






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






32. The symbol ≤ is read as __________ .






33. 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.






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






35. 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.






36. Use number lines to ________ two decimals.






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






38. 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.






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






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






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






42. 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).






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






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






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






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






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






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






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






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