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M3 9.1 ADDITION (2)

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  • SOLVE 45 + 94
    139
  • Add in a different way: 1 + 8 + 9
    1 + 8 + 9 = 18
  • SOLVE 234 + 288
    522
  • Do we need to regroup in 463 + 124?
    No
    Yes
  • ESTIMATE 234 + 288
    520 or 500
  • ESTIMATE 45 + 94
    140
  • Do we need to regroup in 246 + 986?
    No
    Yes
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