Definitions
the answer to an addition problem.
sum
addend
a number which is added to another.
physical objects students use to learn math concepts.
concrete model; hands on; use manipulatives
the answer to a subtraction problem
difference
expanded form
a way to write a number by showing the value of each digit.
Using visuals to solve a problem
draw a picture
the value of a digit in a number based on its position.
place value
subtraction
the process or skill of taking one number or amount away from another.
using what you know to solve the problem in your head
mental math
the action or process of adding something to something else.
addition
estimate
a quick, approximate calculation that is close enough to the correct answer but not exact
splitting a number to make ten then solve.
make ten
to break down a number
decompose
compose
to put together or combine smaller parts to create a larger number
using a problem you already know the answer to, to solve the problem.
fact families