## Test your basic knowledge |

# Important Math Facts

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

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

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

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

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

**6. 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.**

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

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

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

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

**11. The opposite of a positive integer is a ________ .**

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

**13. An approximation of pi is 3.14 - or _______ .**

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

**15. The line or the fold is called the __________ .**

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

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

**18. An _________ is a mathematical sentence that contains < - > - - ≤ - or ≥ .**

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

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

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

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

**23. 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.**

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

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

**26. A _______ is the comparison of two numbers by division.**

**27. The symbol < is read as ________ .**

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

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

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

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

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

**33. The symbol ≥ is read as ______________.**

**34. Both addition and multiplication are _________ . This means that order doesnft change the sum or product.**

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

**36. A _______ is a ratio that compares a number to 100.**

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

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

**39. The symbol ≤ is read as __________ .**

**40. 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.**

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

**42. 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.**

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

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

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

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

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

**48. Together - the x coordinate and y coordinate form an ___________.**

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

**50. ______________ 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.**