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

Toán Lớp 4: _____ _____ abc0 – abc =2745 hỏi abc bằng bao nhiêu giúp mình nha

Toán Lớp 4: _____ _____
abc0 – abc =2745
hỏi abc bằng bao nhiêu
giúp mình nha

Comments ( 2 )

  1. $\text{abc . 10 – abc = 2745}$
    $\text{abc . (10 – 1) =2745 }$
    $\text{abc . 9 = 2745}$
    $\text{abc = 2745 : 9 =305}$
    huy

  2. \overline{abc0}-\overline{abc}=2745
    \overline{abc} xx 10 – \overline{abc} = 2745
    \overline{abc} xx (10-1) = 2745
    \overline{abc} xx 9 = 2745
    \overline{abc} = 2745 : 9
    \overline{abc} = 305
    Vậy \overline{abc} = 305
     

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

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