G-2 1st 9 weeks L-1 Vocabulary Practice

​Practice
2nd grade 1st 9 weeks vocabulary definitions.

​add: to put together two or more quantities (amounts), to find the total of two or more numbers, or to find how many in all.
Example: 3 + 2 = 5




Quantity Total

​equation: a mathematical statement that uses an equal sign (=) to show that two things have the same value.
Example: 4 + 2 = 6 3 + 4 = 2 + 5

​Open number line: a straight number line with only the numbers important to a problem labeled.

​sum: the result of addition.

Example: 4 + 5 = 9



sum

​unknown number: a number that is missing or not known in a problem, and is often shown as a box or a symbol. unknown number

Example: 3 + = 7

Example: 4 + 1 = unknown number

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​addend: a number being added.

4 + 3 = 7

​addend

​count on: start with one addend and count to find a total.