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

Toán Lớp 7: B=5/2.1+4/1.11+3/11.2+1/2.15+13/15/4 lam nha a

Tháng Một 8, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: B=5/2.1+4/1.11+3/11.2+1/2.15+13/15/4
lam nha a

Comments ( 2 )

  1. truongthanhhung
    truongthanhhung
    8 Tháng Một, 2023 at 9:08 sáng
    Reply
    B=5/(2.1)+4/(1.11)+3/(11.2)+1/(2.15)+13/(15.4)
    1/7B = 5/(2.7)+4/(7.11)+3/(11.14)+1/(14.15)+13/(15.28)
    1/7B = 1/2 – 1/7 + 1/7 – 1/11 + 1/11 – 1/14+1/14-1/15+1/15 – 1/28
    1/7B = 1/2 – 1/28
    1/7B = 14/28 – 1/28
    1/7B = 13/28
    B = 13/28 . 7
    B = 13/4
    (Chúc bạn học tốt)
     

  2. kimlien
    kimlien
    8 Tháng Một, 2023 at 9:08 sáng
    Reply
    B=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
      B/7=5/2.7+4/7.11+3/11.14+1/14.15+13/15.28
      B/7=1/2-1/7+1/7-1/11+1/11-1/14+1/14-1/15+1/15-1/28
      B/7=1/2-1/28
      B/7=13/28
      B=13/28 x7
      B=13/4
     

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

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