
Math Vocabulary
1. placewhere a number goes
2. placevalue charta chart that shows the value of the digits in a number
3. standard form(8,654)usual or common way to write a number
4. expanded form(8,000 + 600 + 50 + 2) a way of writing a number as the sum of the values of its digit
5. periodeach group of three digits on a placevalue chart
6. greater than>
7. less than<
8. equal =
9. greatest the largest number
10. least the smallest number
11. decimal a number that has a digit in the tenths, hundredths, and thousandths place
12. decimal pointa period separating the ones and the tenths in a decimal. ex. 0.8 or 3.77
13. equivalent decimals decimals that have the same value
14. product the answer to a multiplication problem
15. sum the answer to an addition problem
16. digitsare numbers (ex. 1,2,3)
17. annex when you add another zero to a decimal. ex (26.5 add zero 26.50)
18. prime numbers is a whole number that has exactly two factors, 1 and the number itself.
19. composite numberis a whole number that has more than two factors.
20. prime factorizationa way of expressing a composite number as a product of its prime factors.
21. exponent is a power, the number of times the base is used as a factor.
22. basein a power, the number used as a factor.
23. powera number obtained by raising a base to an exponent
24. squareda number raised to the second power (ex3x3) or (3 squared)
25. distributive property allows you to multiply a sum by a number.
26. compatible numbersnumbers in a problem that are easy to work with mentally.
27. commutative property order in which numbers are added does not change the sum.
28. estimate a number close to an exact value.
29. dividend a number that is being divided.
30. divisor the number that divides the dividend.
31. quotientthe answer to a division problem.
32. fact family a group of related facts using the same numbers.
33. unknown a missing value in a number sentence.
34. variable a letter or symbol used to represent an unknown quantity.
35. round to find the approximate value of a number.
36. decimal a number that has a digit in the tenths, hundredths and thousandths place.
37. difference the answer to a subtraction problem.
38. inverse operations  operations that undo each other.
39. identity property any number plus zero equals that number.
40. associative property the way in which numbers are grouped does not change the sum.
41. commutative property the order in which numbers are added does not change the sum.
42. fractiona number that names equal parts of a whole or parts of a set.
43. numerator number of parts represented by a fraction (top number).
44. denominator the number of parts in a whole (bottom number).
45. common factors factors shared by two or more numbers.
46. greatest common factor (GCF)factors shared by two or more numbers that are common
47. simplest forma fraction that is written when the greatest common factor of the numerator and denominator is one.
48. equivalent fractionsare fractions that name the same number.
49.multiple the product of the number and any other whole number.
50.common multiples multiples that are shaded by two or more numbers.
51.least common multiple (LCM) is the least multiple other than 0.
52.least common denominator (LCD) is the LCM of the denominator of the fraction.
place value (click on for music video)