Question

Answer 1

`a, = -11/11 + 33/33 + 10/12`

`= 5/6`

`b, = 34/34 - 27/27 +3`

`= 3`

Answer 2

`5) -15/11 +10/12 +15/33 +4/11 +18/33`

`= (-15/11+4/11) + (15/33 +18/33) + 10/12`

`= -11/11 + 33/33 +5/6`

`= -1 + 1 +5/6 `

`=5/6`

`6)15/34 + (-7/27) + 19/34 -20/27 +21/7`

`= (15/34+ 19/34 ) + (-7/27 -20/27) + 21/7`

`=34/34 + (-27/27) + 3`

`= 1 + (-1) +3`

`= 0+3 =3`