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

Toán Lớp 4: 1/5 + 1/6 + 1/10 + 1/15 + 1/21 + 1/28 + 1/36 bằng bao nhiêu?

Toán Lớp 4: 1/5 + 1/6 + 1/10 + 1/15 + 1/21 + 1/28 + 1/36 bằng bao nhiêu?

Comments ( 2 )

  1. 1/5 + 1/6 + 1/10 + 1/15 + 1/21 + 1/28 + 1/36
          =11/30 + 1/10 + 1/15 + 1/21 + 1/28 + 1/36
          =7/15 + 1/15 + 1/21 + 1/28 + 1/36
          =8/15 + 1/21 + 1/28 + 1/36
          =61/105 + 1/28 + 1/36
          =37/60 + 1/36
          =29/45.
     

  2. Giải đáp:
      1/5 + 1/6 + 1/10 + 1/15 + 1/21 + 1/28 + 1/36
          =11/30 + 1/10 + 1/15 + 1/21 + 1/28 + 1/36
                        =7/15 + 1/15 + 1/21 + 1/28 + 1/36
                                    =8/15 + 1/21 + 1/28 + 1/36
                                            =61/105 + 1/28 + 1/36
                                                          =37/60 + 1/36
                                                          =29/45.
          Gửi bạn!!!

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