Question

[Nh]

Thực hiện phép tính

-3/4 . (-55/9) . 8/11

1 4/23 + ( 5/21 - 4/23) + 16/21 - 1/2

-3/8 . 6/13 + 7/13 . -3/8 + 1 3/8

75% - ( 5/2 + 5/3 ) + ( - 1/2) mũ 2

Giúp mình với đi please

Answer 1

[Nguyễn Thị Thương Hoài]

- \(\dfrac{3}{4}\).(-\(\dfrac{55}{9}\)).\(\dfrac{8}{11}\)

= \(\dfrac{3.5.11.4.2}{4.3.3.11}\)

= \(\dfrac{10}{3}\)

Answer 2

[Nguyễn Thị Thương Hoài]

   1\(\dfrac{4}{23}\) + (\(\dfrac{5}{21}\) - \(\dfrac{4}{23}\)) + \(\dfrac{16}{21}\) - \(\dfrac{1}{2}\)

= 1 + \(\dfrac{4}{23}\) + \(\dfrac{5}{21}\) - \(\dfrac{4}{23}\) + \(\dfrac{16}{21}\) - \(\dfrac{1}{2}\)

= 1 + (\(\dfrac{4}{23}\) - \(\dfrac{4}{23}\)) + (\(\dfrac{5}{21}\) + \(\dfrac{16}{21}\)) - \(\dfrac{1}{2}\)

= 1 + 0 + 1 - \(\dfrac{1}{2}\)

= 2  - \(\dfrac{1}{2}\)

= \(\dfrac{3}{2}\)