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

Toán Lớp 5: Tính nhanh : 19,72 : 5,8 + 3,48 : 5,8

Toán Lớp 5: Tính nhanh : 19,72 : 5,8 + 3,48 : 5,8

Comments ( 2 )

  1. 19,72 : 5,8 + 3,48 : 5,8
    =(19,72 + 3,48) : 5,8
    =23,2 : 5,8
    =4

  2. 19,72 : 5,8 + 3,48 : 5,8
    = 19,72 : 29/5 + 3,48 : 29/5
    = 19,72 xx 5/29 + 3,48 xx 5/29
    = ( 19,72 + 3,48) xx 5/29
    = 23,2 xx 5/29
    = 116/29
    =4
     #caty09

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