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

Toán Lớp 7: $\sqrt[]{25}$ . (0,4 – 1$\frac{1}{2}$) : [(-2)$^{3}$ . $\frac{11}{8}$]

Toán Lớp 7: $\sqrt[]{25}$ . (0,4 – 1$\frac{1}{2}$) : [(-2)$^{3}$ . $\frac{11}{8}$]

Comments ( 2 )

  1. \sqrt{25} . (0,4 – 1 1/2 ) : [(-2)^3 . 11/8 ]
    = 5 . ( 2/5 – 3/2 ) : (-8 . 11/8)
    = 5 . ( 4/10 – 15/10 ) : (-11)
    = 5. (-11)/10 : (-11)
    = 5. (-11)/10 . 1/(-11)
    = 5 . 1/10
    = 1/2
     

  2. Lời giải chi tiết:
    \sqrt{25}.(0,4-1\frac{1}{2}):[(-2)^3.(11)/8]
    =5.(2/5-3/2):(-8.(11)/8)
    =5.((-11)/10):(-11)
    =-11/2:(-11)
    =1/2

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

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