Math- Multiplication and Division
Associative Property of Multiplication
If 3 or more factors are multiplied, they can be grouped in any order, and the product will stay the same.
Commutative Property of Multiplication
If the order of factors are changed, the product will stay the same
Compatible Numbers
"Friendly" numbers that are easy to multiply or divide
Expression
A combination of numbers and operations (No equal sign)
Model
A diagram or drawing to represent an operation
Repeated Subtraction
A division strategy that subtracts the same number over and over again
Multiples
A list of the products of a number times other numbers
Strip Diagram
A model of a math problem that uses rectangular bars with numbers and symbols
Partial Products
A multiplication strategy that breaks numbers into smaller factors that can be added together
Factor
A number multiplied by another number
Equation
A number sentence with an equal sign
Dividend
A number that is being divided in a division problem
Divisor
A number the dividend is being divided by in a division problem
Array
A set of objects arranged in equal rows and columns
Thinking Patterns
A strategy to help choose the correct operation when solving word problems
Input-Output Table
A table that has numbers that relate to each other with a rule
Repeated Addition
A way to model multiplication by adding equal groups together
Area Model
A way to represent multiplication where the length and width of rectangles are the factors of the problem
Operations
Addition, Subtraction, Multiplication, Division
Equal Groups
Groups with the same number of objects in each group
Each Group
ONE group
Fact Families
Related equations using the same numbers
Quotient
The answer to a division problem
Area
The number of square units that cover a flat surface
Remainder
The number that is left over after dividing
Multiplication
The operation that joins equal groups to find a total
Division
The operation that separates objects into equal groups to find the number in each group or to find the number of equal groups
Product
The total when numbers are multiplied together (the answer to a multiplication problem)
Round
To change a number to the nearest ten or hundred to make it easy to estimate
Explain
To describe how a problem is solved step by step
Estimate
To find an answer close to the actual answer, but is not exact
Justify
To prove how you know an answer is correct
Divisible
When numbers can be divided with no remainder
Reasonableness
When the answer to a problem makes sense
