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### 14 Cards in this Set

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 Use digits and symbols to write "the sum of 2 and 3 is less than the product of 2 and 3. 2 + 3 < 2 x 3 To find a missing divisor in a division problem, we __________. divide 5-3=2 3-5=-2 Reversing the order in subtraction results in the ___________ difference. opposite A letter that stands for an unknown number is called a ______________. variable The numbers to the right of zero on the number line are called ___________ numbers. positive To find a missing dividend in a division problem, we _____________. multiply The numbers to the left of zero on the number line are called ___________ numbers. negative Tell how you would find n in this problem: 3+4+n+7+8=40 Add the known addends and subtract their sum from 40. To find a missing subtrahend in a subtraction problem, we _______________. subtract To find a missing factor in a multiplication problem, we ___________. divide We can find a missing addend in an addition problem by ______________. subtracting Zero is neither _____________ nor ____________. positive negative The zero point on a number line is called the __________. origin To find a missing minuend in a subtraction problem, we _______. add