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  • Estimate: 564 + 239
    600 + 200 = 800
  • Add: 824 + 539
    1,363
  • Round 863 to the nearest hundred.
    900
  • Add: 746 + 289
    1,035
  • Estimate: 423 + 189
    400 + 200 = 600
  • Estimate: 764 + 231
    800 + 200 = 1,000
  • Estimate: 478 - 251
    500 - 300 = 200
  • Add: 657 + 452
    1,109
  • Round 296 to the nearest ten.
    300
  • Estimate: 874 - 453
    900 - 500 = 400
  • Estimate 659 - 453 to the nearest ten.
    660 - 460 = 200
  • Estimate: 982 - 456
    1,000 - 500 = 500
  • Round 989 to the nearest hundred.
    1,000
  • Round 456 to the nearest ten.
    460
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