Truong Nguyen

Tính hợp lí (7+7/5-2/3)-(4+4/5+3/8)+(3-2/5+2/3+3/8)

3
3 Câu trả lời
  • Truong Nguyen
    Truong Nguyen

    Biết tuốt ơi

    0 Trả lời 18:46 26/11
    • Truong Nguyen
      Truong Nguyen

      6

      0 Trả lời 18:47 26/11
      • Biết Tuốt
        Biết Tuốt

        \left(7+\frac{7}{5}-\frac{2}{3}\right)-\left(4+\frac{4}{5}+\frac{3}{8}\right)+\left(3-\frac{2}{5}+\frac{2}{3}+\frac{3}{8}\right)

        =7+\frac{7}{5}-\frac{2}{3}-4-\frac{4}{5}-\frac{3}{8}+3-\frac{2}{5}+\frac{2}{3}+\frac{3}{8}

        =\left(7-4+3\right)+\left(\frac{7}{5}-\frac{4}{5}-\frac{2}{5}\right)+\left(-\frac{2}{3}+\frac{2}{3}\right)+\left(-\frac{3}{8}+\frac{3}{8}\right)

        =6+\frac{1}{5}+0+0=\frac{31}{5}

        0 Trả lời 19:24 26/11