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10 Cards in this Set
- Front
- Back
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addends
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the nunnbers used in an addition problem
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sum
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the answer to an addition problem
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addition facts
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an addition sentence that tells the usm of two 1-digit numbers
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difference
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the answer to a subtraction problem
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even number
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even numbers are the numbers you name when you skip count by two's. Even numbers that can be formed by making pairs.
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odd number
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when you try to put an odd number of things into pairs, there is always one left over
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ordinal number
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tells you the position of people or things that are in order
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variable
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a symbol, usually a letter, that represents a number
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open sentence
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a mathematical sentence that contains a variable. It is called an open sentence because until you know what the value of the variable is, you can't tell whether the sentence is true or false
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periods
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the groups of three places on the number chart that are separated by periods
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