Look at the sums in the shaded row and column. Look at the addends.
An addition table with shaded sums for the 12 column and the 12 row: twelve plus zero equals twelve, twelve plus three equals fifteen, twelve plus six equals eighteen, twelve plus nine equals twenty-one, twelve plus twelve equals twenty-four, twelve plus fifteen equals twenty-seven, twelve plus eighteen equals thirty, twelve plus twenty-one equals thirty three, zero plus twelve equals twelve, three plus twelve equals fifteen, six plus twelve equals eighteen, nine plus twelve equals twenty-one, twelve plus twelve equals twenty-four, fifteen plus twelve equals twenty-seven, eighteen plus twelve equals thirty, twenty-one plus twelve equals thirty three.
Part A
What pattern do you see? Select the correct words from the drop-down menu.
(1 point)
The sums in the row are
double
the sums in the column.
Question 2
Part B
Which property explains why this pattern is always true?
(1 point)
Responses
the Identity Property of Addition
the Identity Property of Addition
the Commutative Property of Addition
the Commutative Property of Addition
the Associative Property of Addition
the Associative Property of Addition
the Identity Property of Multiplication
the Identity Property of Multiplication
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The pattern is that the sums in the row are double the sums in the column.
The property that explains why this pattern is always true is the Commutative Property of Addition.