• Math Vocabulary

1. place-where a number goes

2. place-value chart-a 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. period-each group of three digits on a place-value 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 point-a 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

16. digits-are 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 number-is a whole number that has more than two factors.

20. prime factorization-a 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. base-in a power, the number used as a factor.

23. power-a number obtained by raising a base to an exponent

24. squared-a number raised to the second power (ex-3x3) or (3 squared)

25. distributive property- allows you to multiply a sum by a number.

26. compatible numbers-numbers 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. quotient-the 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. fraction-a 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 form-a fraction that is written when the greatest common factor of the numerator and denominator is one.

48.- equivalent fractions-are 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.

Common Core Math Vocabulary

place value    (click on for music video)  