Question

bài 1

a,2-\(\dfrac{2}{3}\)+2,5+\(\dfrac{1}{3}\)+3+\(\dfrac{1}{2}\)

b,\(\dfrac{9}{10}\)-(\(\dfrac{6}{5}\).\(\dfrac{3}{2}\)+\(\dfrac{7}{4}\))

Answer 1

`#3107.101107`

1.

`a,`

`2 - 2/3 + 2,5 + 1/3 + 3 + 1/2`

`= (2 + 2,5 + 3) - (2/3 - 1/3 - 1/2)`

`= 7,5 - (-1/6)`

`= 7,5 + 1/6`

`= 23/3`

`b,`

`9/10 - (6/5 * 3/2 + 7/4)`

`= 9/10 - (18/10 + 7/4)`

`= 9/10 - 18/10 - 7/4`

`= -9/10 - 7/4`

`= -53/20`