Area Model - a figure used to represent area; may be used as a strategy for multiplication, Array - an arrangement of objects in equal rows and columns, Commutative propert - a property of addition or multiplication in which the sum or product stays the same when the order of the addends or factors is changed, such as 3 + 4 = 4 + 3 and 5 x 2 = 2 x 5, Divide - to separate into equal parts or equal groups, Division - the operation of making equal groups to find the number in each group or to find the number of equal groups, Equation - a number sentence that uses the equal sign to show that two amounts are equal, Expression - a mathematical phrase that can contain numbers, variables, and operators, Fact family - a set of related number sentences; also called related facts, Factor - a number that is multiplied by another number to find a product, Multiplication - the operation using repeated addition of the same number; combining equal groups, Multiply - to join or combine equal groups, Number line - a line on which numbers are marked at intervals, used to illustrate simple numerical operations, Operation - an arithmetic procedure, such as addition, subtraction, multiplication, or division, that is used to solve a mathematical problem, Product - the answer to a multiplication problem, Relationship - a connection or pattern found between numbers, Repeated Addition - 8 + 8 + 8 = 8 x 3, Skip counting - within multiplication, using multiples of a number, such as 3, 6, 9, and 12 to reinforce equal groups and repeated addition, Strip diagram - a model or drawing that looks like a strip of tape; a strip diagram is used to represent number relationships, Quotient - the answer to a division problem,

Third Grade Math Unit 1

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