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

Toán Lớp 5: 76*47-28/76*46+48 =? [ * là nhân ]

Toán Lớp 5: 76*47-28/76*46+48 =? [ * là nhân ]

Comments ( 2 )

  1. (76 × 47 – 28)/(76 × 46 + 48)
    = (76 × 46 + 76 – 28)/(76 × 46 + 48)
    = (76 × 47 + 48)/(76 × 46 + 48)
    = 1
     

  2. {76 × 47 – 28}/{76 × 46 + 48}
    = {76 × 46 – 28}/{76 × ( 47 – 1 ) + 48}
    = {76 × 46 – 28}/{76 × 47 – ( 76 – 48 )}
    = {76 × 46 – 28}/{76 × 46 – 28}
    = 1
    #dtkc
     

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