a
operations examples
addition, subtraction, multiplication, division
45 x 11=
495
17 x 14 =
238
125 x 5 =
625
21 x 11 =
231
a combination of numbers and operations (no equal sign)
expression
the missing number in an equation
unknown quantity
a number multiplied by another number
factor
equation
a number sentence with an equal sign
groups with the same number of objects in each group
equal group
to change a number to the nearest ten of hundred to make it easy to estimate
round
to find an answer close to the actual answer, but is not exact
estimate
a diagram or drawing to represent an operation
model
a list of the products of a number times other number (like when you skip count)
multiples
operation that joins equal groups to find a total
multiplication
the number of square units that cover a flat surface
area
a multiplication strategy that breaks numbers into smaller factors that can be added together
partial products
a set of objects arranged in equal rows and columns
array
the total when numbers are multiplied together (the answer to a multiplication problem)
product
a strategy to help choose the correct operation when solving word problems
thinking patterns
a way to represent multiplication where the length and width of rectangles are the factors of the problem
area model
if 3 or more factors are multiplied, they can be grouped in any order, and the product will stay the same
associative property of multiplication
if the order of factors are changed, the product will stay the same
commutative property of multiplication
breaking a large fact into 2 smaller facts that can be added together
distributive property of multiplication
way to remodel multiplication by adding equal groups together
repeated addition