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Commutative law for multiplication

The properties of multiplication are more apparent from the array and area approach rather than a number line. Turning the 3 × 5 array on its side illustrates that 3 × 5 = 5 × 3 because the 'area' does not change.

5 orange strips each with 3 stars in it and 3 orange strips each with 5 stars in it.
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We can also see this by rotating the appropriate rectangle.

Two rectangles.
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