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

Toán Lớp 5: a/ ( X + 7,6) x 10,8 = 270 b/ 75,5 x 4 – X = 192,78

Toán Lớp 5: a/ ( X + 7,6) x 10,8 = 270 b/ 75,5 x 4 – X = 192,78

Comments ( 2 )

  1. $a) (x + 7,6) × 10,8 = 270$
    $(x + 7,6) = 270 : 10,8$
    $x + 7,6 = 25$
    $x = 25 – 7,6$
    $x = 17,4.$
    $b) 75,5 × 4 – x = 192,78$
    $302 – x = 192,78$
    $x = 302 – 192,78$
    $x = 109,22.$

  2. a) (x + 7,6 ) xx 10,8 = 270
    x + 7,6 = 270 : 10,8
    x + 7,6 = 25
    x = 25 – 7,6
    x = 17,4
    ____________________________
    b) 75,5 xx 4 – x = 192,78
    302 – x = 192,78
    x = 302 – 192,78
    x = 109,22
    #dpa
     

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

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