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Explain how you could use a number line to show that -4+3 and 3+ -4 have the same value. Which property of addition states that the sums are equivalent?
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Explain how you could use a number line to show that -4+3 and 3+ -4 have the same value. Which property of addition states that the sums are equivalent?

User Daniel Samson
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For -4+3, plot -4 on the number line and move up three steps.
For 3+-4, plot 3 on the number line and move back four steps.
You should end at -1 both times.
This demonstrates the commutative property of addition.
User Mussdroid
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