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

Toán Lớp 6: [2^3 x 9^4+9^3 x 45] :[9^2 x 10- 9^2]

Toán Lớp 6: [2^3 x 9^4+9^3 x 45] :[9^2 x 10- 9^2]

Comments ( 2 )

  1. (2^3 xx 9^4+9^3 xx 45):(9^2 xx 10 -9^2)
    =(2^3 xx 9^4+9^3 xx 9xx 5):[9^2xx(10-9)]
    =(2^3 xx 9^4+9^4 xx5):[9^2 xx9]
    =[(2^3+5)xx9^4]:9^3
    =13xx9^4:9^3
    =13xx9
    =117

  2. (2^3 xx 9^4+9^3 xx 45):(9^2 xx 10 -9^2)
    =(2^3 xx 9^4+9^3 xx 9xx 5):[9^2xx(10-9)]
    =(2^3 xx 9^4+9^4 xx5):[9^2 xx9]
    =[(2^3+5)xx9^4]:9^3
    =13xx9^4:9^3
    =13xx9
    =117

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