This property of multiplication is called the commutative property of multiplication.
The models show that 4 rows of 3 and 3 rows of 4 both equal 12.
This property of multiplication is called the associative property of multiplication.
The models show that 4 groups of 2 × 3 and 2 groups of 3 × 4 both equal 24.
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(2 × 3) × 4 | = | 2 × (3 × 4) |