Commutative Property of Addition
The order in which you combine addends will not change their sum
Identity Property of Addition
Any number plus zero will have a sum equal to the non-zero number
Associative Property of Addition
The way addends are grouped will not change their sum. Another way to think about the associative property is that the numerals themselves can be understood as groups that can be combined and shifted around.
What is the “Make-10” strategy?
Make-10 involves moving a portion of one addend to the other to make a multiple of 10 that is easier to work with.
What is front-end addition?
This strategy is a non-standard algorithm, and makes use of numbers in their expanded form.
142 + 288 = (100 + 200) + (40 + 80) + (2 + 8)
The partial sums algorithm is similar, but it solved vertically
What is the standard algorithm?
The way you learned it
Why do you keep getting word problems wrong?
You’re not reading the whole thing!!!
