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1, 10, or 100 More/Less of 2-Digit and 3-Digit N ...

  •  English    27     Public
    Mentally add or subtract 1, 10 or 100 to a given 2-digit or 3-digit number.
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  • 340 + 10
    350
  •  15
  • one hundred less than 521
    421
  •  15
  • one more than 69
    70
  •  15
  • 793 + 100
    893
  •  15
  • When adding 100 to the number 563, which digit will change? Solve 563 + 100
    The 5 changes. 563 + 100 = 663
  •  25
  • When subtracting 10 from 147, which digit changes? Solve 147 - 10
    The 4 changes. 147-10 = 137
  •  25
  • 882 - 10
    872
  •  15
  • 100 less than 528
    428
  •  15
  • 100 more than 111
    211
  •  15
  • 10 less than 503
    493
  •  25
  • 10 more than 249
    259
  •  15
  • 100 more than 17
    117
  •  15
  • When adding 10 more to 289, which digit changes? Solve 289 + 10
    The 8 changes. 289+10 = 299
  •  20
  • When subtracting 100 from 301, which digit changes? Solve 301 - 100
    The 3 changes. 301-100 = 201
  •  20
  • one more than 499
    500
  •  20
  • one less than 600
    599
  •  20