Question

[Dương Tùng Lâm]

Tính bằng hai cách 3/7 x 16/33 + 16/33 x 4/7=

Answer 1

[Nguyễn Thị Thương Hoài]

Cách 1:

     \(\dfrac{3}{7}\) x \(\dfrac{16}{33}\) + \(\dfrac{16}{33}\) x \(\dfrac{4}{7}\)

=    \(\dfrac{48}{231}\) + \(\dfrac{64}{231}\)

= \(\dfrac{112}{231}\)

= \(\dfrac{16}{33}\)

cách 2:  \(\dfrac{3}{7}\) x \(\dfrac{16}{33}\) + \(\dfrac{16}{33}\) x \(\dfrac{4}{7}\)

       = \(\dfrac{16}{33}\) x ( \(\dfrac{3}{7}\) + \(\dfrac{4}{7}\))

      = \(\dfrac{16}{33}\) x \(\dfrac{7}{7}\)

     = \(\dfrac{16}{33}\)

Answer 2

[Phan thi yến nhi]

9,3×6,7+3,3