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

Toán Lớp 6: Cần trợ giúp ạ ==>41×82-20^2+18×44

Toán Lớp 6: Cần trợ giúp ạ
==>41×82-20^2+18×44

Comments ( 2 )

  1. 41×82-$20^{2}$+18×44
    =41×82-400+18×44
    =3362-400+792
    =2962+792=3754
    XIN 5*

  2. Giải.
    41×82-20^2+18×44
    =41×82-20^2+18×(41+3)
    =41×82-20^2+18×41+18×3
    =(41×82+18×41)-20^2+18×3
    =41×(82+18)-20^2+54
    =41×100-400+54
    =4100-400+54
    =3754.

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