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math

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Use front-end estimation with adjustment to estimate each of the following:

a. 2345 + 5250 + 4210 + 910
b. 345 + 518 + 655 + 270

  • math -

    a. 2300 + 5300 + 4200 + 900 = 12,700.

    b. 300 + 500 + 700 + 300 = 1800.

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