Question

Answer 1

`a, (2/3 - 1) - [1/3 - (5/3 - 1)]`

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

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

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

`= 2  - 2`

`= 0`

`b, (1/3 + 1/6) . 1/11 - 1/2 : (1 - 1/12)`

`= (2/6 + 1/6) . 1/11 - 1/2 : (12/12 - 1/12)`

`= 1/2 . 1/11 - 1/2 : 11/12`

`= 1/2 . 1/11 - 1/2 . 12/11`

`= 1/2 . (1/11 - 12/11)`

`= 1/2 . (-1)`

`= -1/2`

Answer 2

`c, -((sqrt(25))^2)/13 - (sqrt(81))/17 + 12/13 + (-25/17)`

`= -25/13 - 9/17 + 12/13 - 25/17`

`= (-25/13 + 12/13) + (-9/17 - 25/17)`

`= -13/13 - 34/17`

`= -1 - 2`

`= -3`

`d, 2^4 + 8 . [(-2)^2 : 1/2]^0 -  1/(2^2) *4 + (-2)^2`

`= 16 + 8 * 1 - 1/4 * 4 + 4`

`=16 + 8 -1 + 4`

`= 27`

Answer 3

Answer 4

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