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Because - without even basic maths skills you wouldn't be able to do something as simple as buy a newspaper ! If you have no knowledge of maths at all - you wouldn't know (a) how much money to give the vendor and (b) whether they had given you the correct change !

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Q: Why is it important to know how to add subtract multiply and divide?
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What is important to know in 7th grade math?

How to add, subtract, multiply and divide WITHOUT a calculator.

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What are the order of operations mnemonic?

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