(-14) + 81 = 81 + (-14) additive identity
2. · = 1
distributive property
3. 101 + (29 + 417) = (101 + 29) + 417
commutative property of addition
4. (24 + 15) = · 24 + · 15
multiplicative inverse
5. -72 + 0 = -72
associative property of addition

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