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Vocabulary in Chapter 5 Longman's Mathematics


A number that another number is subtracted from. 9-3=6 (9)


The symbol for addition. "+"


The symbol for subtraction. "-"


A number that is subtracted from another number. 9-3= 6 (3)


The opposite. Inverse of "+" is "-."


Numbers added together to give a sum. 3+6=9 3, (6 )


The answer when adding two or more addends. 3 + 6 = 9 (9)

Associative Property of Addition

Law stating when we group three or more numbers in different ways the sum is not affected. (5+6) +3 = 5 + (6 + 3)

Commutative Property of Addition

Law stating that adding numbers in any order does not affect the sum. 3+6=6+3

additive identify

Law stating that adding zero to any number does not affect the sum. 7+0=7


The operation of subtracting two numbers to result in a difference. 9-6=3

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