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

Toán Lớp 6: Thực hiện phép tính: a)28.56+64.28+120.57 b) {[49:(23-4 mũ 2)].144}:6-2 mũ 6 Nhanh giúp mik ạ đang cần gấp

Toán Lớp 6: Thực hiện phép tính:
a)28.56+64.28+120.57
b) {[49:(23-4 mũ 2)].144}:6-2 mũ 6
Nhanh giúp mik ạ đang cần gấp

Comments ( 2 )

  1. a) 28.56+64.28+120.57
    = 28.(56+64)+6840
    = 28.120+6840
    = 3360+6840
    = 10200
    b) {[49:(23-4²)].144}:6-2 $^{6}$
    = {[49:(23-16)].144}:6-64
    = {[49:7].144}:6-64
    = {7.144}:6-64
    = 1008:6-64
    = 168-64
    = 104
    $#Na$

  2. #andy
    \[\begin{array}{l}
    a)28.56 + 64.28 + 120.57\\
     = 1568 + 1792 + 6840\\
     = 10200\\
    b){\rm{ }}\left\{ {\left[ {49:\left( {23 – {4^2}} \right)} \right].144} \right\}:6 – {2^6}\\
     = \{ \left[ {49:\left( {23 – 16} \right)} \right].144\} :6 – 64\\
     = \{ \left[ {49:7} \right].144\} :6 – 64\\
     = \left( {7.144} \right):6 – 64\\
     = 1008:6 – 64\\
     = 168 – 64\\
     = 104
    \end{array}\]

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

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