How it works
These commutative property of multiplication worksheets all make one point. Swap the two factors and the product stays the same, so 3 × 8 = 8 × 3 = 24. The sheets drill turnaround facts and test where order does matter.
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Why the order does not matter
Turn a 3 by 8 array a quarter turn and it becomes 8 by 3, with the same 24 dots. At grade 3 that picture is the proof. The sheets here practice the rule in equations and do not draw the array. Common Core 3.OA.5 says pupils need not use the formal name, so this page says turnaround facts too.
Half the chart for free
A 10 by 10 printable multiplication chart has 100 boxes but only 55 facts to learn: 10 squares on the diagonal and 45 turnaround pairs. A commutative property of multiplication worksheet can show that saving line by line. Harder table from an easier one, under Learn fewer facts, gives 2 × 7 = 14 and asks for 7 × 2.
- Turn a 3 by 8 array on the board first. A pupil who has watched it turn has the reason, not only the rule.
- In long multiplication, put the smaller number underneath: 243 × 6 is one row of working, 6 × 243 is three.
Questions and answers
What is the commutative property of multiplication?
Changing the order of the factors does not change the product: a × b = b × a. Common Core 3.OA.5 gives the example that if 6 × 4 = 24 is known, then 4 × 6 = 24 is also known.
Is 3 × 8 the same as 8 × 3?
The product is the same, 24. The picture is not. The Common Core reads 5 × 7 as 5 groups of 7 (3.OA.1), so 3 × 8 is 3 groups of 8. In a word problem the order still says which picture to draw.
Does the commutative property work for subtraction and division?
No. 5 − 3 is 2 but 3 − 5 is not, and 8 ÷ 2 is 4 but 2 ÷ 8 is not. Only addition and multiplication commute. The sheet Does the order matter? Four operations puts all four on one page.