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

Toán Lớp 7: Tính: `\frac{3}{5} : (\frac{-1}{15} – \frac{1}{6}) + \frac{3}{5} : (-\frac{1}{3} – 1\frac{1}{15})`

Home/ Toán Lớp 7: Tính: `\frac{3}{5} : (\frac{-1}{15} – \frac{1}{6}) + \frac{3}{5} : (-\frac{1}{3} – 1\frac{1}{15})`

Toán Lớp 7: Tính: `\frac{3}{5} : (\frac{-1}{15} – \frac{1}{6}) + \frac{3}{5} : (-\frac{1}{3} – 1\frac{1}{15})`

Tháng Sáu 3, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: Tính: \frac{3}{5} : (\frac{-1}{15} – \frac{1}{6}) + \frac{3}{5} : (-\frac{1}{3} – 1\frac{1}{15})

Comments ( 2 )

  1. lanthuhoa
    lanthuhoa
    3 Tháng Sáu, 2022 at 9:32 sáng
    Reply
    Answer
    3/5 : (-1/15 – 1/6) + 3/5 : (-1/3 – 1 1/15)
    = 3/5 : {-7}/30 + 3/5 : (-1/3 – 16/15)
    = 3/5 : {-7}/30 + 3/5 : {-7}/5
    = 3/5 . {-30}/7 + 3/5 . {-5}/7
    = 3/5 . (-30/7 – 5/7)
    = 3/5 . {-35}/7
    = 3/5 . (-5)
    = -3

  2. cattien
    cattien
    3 Tháng Sáu, 2022 at 9:31 sáng
    Reply
    3/5 :(\frac{-1}{15}-1/6)+3/5 :(\frac{-1}{3}-1\frac{1}{15})
    =3/5 :(\frac{-2}{30}-5/30)+3/5 :(\frac{-1}{3}-\frac{16}{15})
    =3/5 :(\frac{-2}{30}-5/30)+3/5 :(\frac{-10}{30}-\frac{32}{30})
    =3/5 :(\frac{-2}{30}-5/30)+3/5 :(\frac{-10}{30}-\frac{32}{30})
    =3/5 : (\frac{-7}{30})+3/5 : (\frac{-7}{5})
    =3/5 . \frac{-30}{7}+3/5 . \frac{-5}{7}
    =\frac{-18}{7}+(\frac{-3}{7})
    =\frac{-21}{7}
    =-3

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

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