Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

3rd Cluster 3 Vocabu

CCS NC 3rd grade cluster 3 vocabulary

Addition The process of finding the total of two amounts
Associative Property Add or multiply regardless of the numbers grouped in parenthesis
Compatible number Two numbers that are close in value (friendly numbers)
Difference The result of subtracting one number from another
Equation The process of making 2 things equal
Estimation Make a reasonable guess about something
Expanded Form Writing a number in a way that notes its place value
Friendly Number Numbers that can be easily computed
Horizontal A line that runs from left to right across a surface
Model A visual representation of the math problem
Place Value The value of a digit depending on its place within a number
Reasonableness Determination of how sensible something is
Round A determination of which friendly number the actual number is closes to
Subtraction The process of taking a specific number away from a group
Sum The result of adding two or more numbers
Symbol An object or picture that represents something else
Unknown Number A number we do not know, usually represented by a symbol
Vertical A line that runs up and down
Whole Number Numbers that represent whole objects without pieces.
Created by: teach3rd