Third Grade Vocabulary 11-12-12
1. array – an arrangement of objects in equal rows. An array is used to help with
multiplication and division problems.
3 X 5 = 15 or 15 3 = 5
Ex. –
2. sum – total; the result of addition
Example: 3 + 4 = 7 (sum)
3. difference – the result of subtraction
Example: 5 – 2 = 3 (difference)
4. product – the result of multiplication
Example: 2 x 5 = 10 (product)
5. estimate – a number close to an exact amount.
Example: an estimate for the sum of 19 + 48 is 70. 19 rounds to 20 and 48
rounds to 50.
6. addends – any number being added
Example: 6 (addend) + 7 (addend) = 13
7. digit-any of the symbols used to write numbers (1,2,3,4,5,6,7,8,9,0)
Example: 4,256
8. equation – mathematical sentence with an equal sign
Example: 5 +3 = 8 and b + 7 = 15 are both equations
9. Addition – the process of adding digits together to find the sum.
10. Place Value – a system used to tell how much a digit based on groups of 10.
11. pattern – a series of numbers or figures that follows a rule
Example: 2, 4, 6, 8, 10 Rule - +2
12. Regrouping – Forming a new group based on groups of 10.
13. Skip Counting – Counting by 2’s, 3’s, 4’s and so on.
14. pictograph – a graph that uses pictures or symbols to show data.
Example:
15. line plots-a graph showing frequency of data on a number line
Example:
16. Axes/Axis – Perpendicular lines used as reference lines on a graph –X Axis and
Y Axis.
EX:
17. Chart – A way to show information, such as in a graph or table.
18. Bar Graph – A graph using bars to show data.
EX:
19. Table – A way of displaying data in rows and columns
EX:
20. Diagram – A picture showing a mathematical situation.
Ex: