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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 4: 5abc = abc x 9 Giải giúp mik với!!!!!!!

Toán Lớp 4: 5abc = abc x 9
Giải giúp mik với!!!!!!!

Comments ( 2 )

  1. overline{5abc} = overline{abc} xx 9
    5000 + overline{abc} = overline{abc} xx 9
    5000 = overline{abc} xx 9 – overline{abc}
    5000 = overline{abc} xx 8
    overline{abc} = 5000 : 8
    overline{abc} = 625
    Vậy : overline{abc} = 625
     

  2. $\overline{5abc}$ = $\overline{abc}$ × 9
    ⇔ 5000 + $\overline{abc}$ = $\overline{abc}$ × 9
    ⇔ $\overline{abc}$ × 8 = 5000
    ⇔ $\overline{abc}$ = 625
    Vậy các chữ số a, b, c lần lượt là 6; 2; 5
     

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222-9+11+12:2*14+14 = ? ( )

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