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Connected Ed Unit 2

Vocabulary Study

TermDefinition
Associative Property of Addition The property which states that the grouping of addends does not change the sum. EX: (2+5)+1=2+(5+1)
Bar diagram A bar diagram is used to illustrate number relationships
Commutative Property of Addition The property that states the order in which two numbers are added does not changed the sum. EX: 5+7=12, 7+5=12
estimate A number close to an exact value. (rounding)
Identity Property of Addition The property that states if you add zero to a number, the sum is the same as the given number. EX: 0+3=3
mental math Ordering or grouping numbers so they are easier to add in your head. (5+5=10)
parentheses symbols that are used to group numbers. They show how to group operations in a number sentence.
pattern A set of numbers that follows a certain order. 2,4,6,8,10
reasonable Within the bounds of making sense. Not a wild guess.
regroup to use place value to exchanged equal amounts when renaming a number. (Addition/Subtraction, borrowing, carrying)
unknown A missing number, or the number to be solved for. 6+7=? ? is the unknown
Created by: Lemmings