Look at the sums in the shaded row and column. Look at the addends.
Part A
What pattern do you see? Select the correct word from the drop-down menu.

The sums in the row are the sums in the column.
A. The same As
B. Double
C. Three less than

Which property explains why this pattern is always true?
A. The Identity Property of Addition
B. The Commutative Property of Addition
C. The Associative Property of Addition.
D. The Identity Property of Multiplication