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12 terms

Saxon math les 6 - 10

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addends
numbers added in an addition problem
algorithm
any process for solving a mathematical problem
commutative property of addition
changing the order of addends does not change their sum (a + b = b + a)
identity property of addition
the sum of any number and 0 is equal to the initial number (a + 0 = a)
sum
the result of addition
ordinal numbers
numbers that describe position or order (first, second . . .)
difference
the result of subtraction
fact family
a group of three numbers related by addition & subtraction or by multiplication & division
inverse operations
operations that "undo" one another
equation
a number sentence that uses the symbol = to show that two quantities are equal
minuend
the top (or largest) number in a subtraction problem
subtrahend
the bottom (or smaller) number in a subtraction problem