3.OA.1: Interpret products of whole numbers, e.g., interpret 5 X 7 as the total number of objects in 5 groups of 7 objects each.
3.OA.2: I can understand division by thinking about how one group can be divided into smaller groups.
3.OA.3: I can use what I know about multiplication and division to solve word problems.
3.OA.6: I can find the answer to a division problem by thinking of the missing factor in a multiplication problem.
EQUATION- a mathematical sentence with an equals sign (=). The amount on one side of the equal sign has the same value as the amount on the other side.
6 + 4 =10 (addition equation) 3 X 2 = 6 (multiplication equation)
REPEATED ADDITION- adding the same number over and over.
Example: 3 + 3 + 3 + 3 + 3 = 15
ARRAY- a set of objects or numbers arranged in rows and columns.
PRODUCT- answer to a multiplication problem. 3 X 2 = 6 (6 is the product)
FACTORS- a whole number that is multiplied with another number to make a third number. 3 X 4 = 12 (3 and 4 are factors)
MULTIPLY-an operation showing how many times a number is added to itself. (5 X 3= 15)
DIVIDE- partitioning a total into equal groups to show how many equal groups add up to a specific number. (15 divided by 5= 3)
QUOTIENT- the answer when one number is divided by another. (the answer to an division problem)
EQUAL GROUPS- having the same amount or value
UNIT FORM- an example is : 6 twos OR 6 groups of two
UNKNOWN FACTOR- the "missing" factor or quantity (total) in multiplication or division
COMMUTATIVE PROPERTY OF MULTIPLICATION -the order in which you add or multiply numbers does not change does not change their sum or product. 6 x 2 = 2 x 6
Distributive Property of Multiplication- property that states that multiplying a sum by a number is the same as mulitplying each addend by the number and then adding the products. ( 2 x 5). + ( 3 x 4) = 10 + 12=22