With the new theorems discussed in class, your proof packets should become much easier. Below is a link that shows how you should use the new addition and subtraction properties. Remember, they're not very different from the addition and subtraction properties we used in algebra proofs.
Here's the reasoning of these properties:
1. Start with two equal "things"
2. Add/Subtract the same thing (or equal things) to both
3. Get equal results
Samples of New Addition/Subtraction Properties - Basic
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