Which equation shows the commutative property of multiplication?
| r = r · 1 |
| s · r = r · s |
| (r − s) · t = r · t − s · t |
| r · s · t = u |
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| r = r · 1 |
| s · r = r · s |
| (r − s) · t = r · t − s · t |
| r · s · t = u |
Now entering the Challenge Zone—are you ready?