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| any number that is added to another to form a sum. |
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| things, people, or actions grouped together because of common traits. |
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| to join together, to add together. |
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| a. the answer to a subtraction problem b. the amount by which one number is kess or more than another number. |
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| a symbol used to show a number. |
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| a number close to an exact number. It is used when an exact number cannot be found or is not needed. |
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| have the same amount, size, or value. |
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| a number sentence that gives two names for the same number. |
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| a set of three numbers used to form basic addition and subtraction facts. |
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| a kind of drawing that shows mathematical information, ideas, and relationships. |
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| a number of things that are put together. |
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| when telling time, this is 30 minutes after the hour. |
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| a written symbol that names a number. |
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| a whole number that cannot be grouped into twos. |
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| the value of a digit determined by its position in a number. |
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| a math puzzle or question to be answered. |
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| a plan for achieving a goal. |
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| the answer to an addition problem. |
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| a figure that can be divided into two equal parts by a straight line. |
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