Answer:
9000
Step-by-step explanation:
rounding to the nearest thousand means rounding by the hundredths digit.
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3437 rounds down to 3000,
^ the four is less than 5, so it rounds down.
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6391 rounds to 6000
^ the three is less than 5, so it rounds down
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3000+6000= 9000
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Hope this helps!
