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What are some situations in which estimating a sum or difference is useful? Why is it useful in these situations?
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What are some situations in which estimating a sum or difference is useful? Why is it useful in these situations?

User Frank Henard
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what exactly are these situations can you tell me and maybe I could help you out.
User Jacob Nordfalk
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Suppose I am in a store buying a shirt, a tie, and slacks. Each of the prices ends in 99 cents, and it is hard to add the exact amounts in my head. I can make an estimate, and decide if this is too much to spend or not.
User DeZigny
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