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

Toán Lớp 6: Tính: 37 – [49 – ( $2^{3}$ . 14 – $2^{3}$ . 15]

Toán Lớp 6: Tính:
37 – [49 – ( $2^{3}$ . 14 – $2^{3}$ . 15]

Comments ( 2 )

  1. 37 – [49 – ( 2^3 . 14 – 2^3 . 3 . 15)]
    = 37 – { 49 – [2^3 . ( 14 – 3. 15) ]}
    = 37 – {49 – [8 . (14 – 45]}
    = 37 – {49 – [ 8 . (-31)]}
    = 37 – {49 – (-248)}
    = 37 – 297
    =-260

  2. 37 – [49 – (2^3 . 14 – 2^3 . 3 . 15)]
    = 37 – [49 – (8 . 14 – 8 . 45)]
    = 37 – {49 -[8 . (14 – 45)]}
    = 37 – {49 – [8 . (-31)]}
    = 37 – [49 – (-248)]
    = 37 – (49 + 248)
    = 37 – 297
    = -260
     

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