Math, asked by manishajuneja81, 1 month ago

please answer the question
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Answered by ram3985

1

Answer:

estimation by nearest tens

439=440

640=640

167=170

so,(440+640)-170 =1080-640=440

estimation by nearest hundreds

439=400

640=600

167=200

so,(400+600)-200=1000-200=800

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