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นักสืบน้อยตามรอย ...

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    นักสืบน้อยตามรอยตัวเลข
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  • 42,500 – x = 17,011
    25,489
  •  15
  • 68,340 – 53,258 = x
    15,082
  •  5
  • X – 42,087 = 48,340
    90,427
  •  10
  • 66,191 – x =36,192
    29,999
  •  20
  • 88,210 – x =46,885
    41,325
  •  25
  • X – 68,505 = 23,680
    92,185
  •  5
  • X – 521,878 = 260,803
    782,681
  •  10
  • 12,500 + x = 37,989
    25,489
  •  15
  • 15,340 + 53,258 = x
    68,598
  •  20
  • X + 42,087 = 90,427
    48,340
  •  25
  • 66,191 + x = 96,190
    29,999
  •  5
  • 73,210 + x =114,788
    41,578
  •  10
  • X + 72,481 = 128,200
    55,719
  •  15
  • X+ 248,259 = 362,751
    114,492
  •  20
  • 942,927 + x = 1,874,253
    931,326
  •  25
  • X+ 25,489 = 37,989
    12,500
  •  5