(i) ((1/3)-3 – (1/2)-3) ÷ (1/4)-3
= (33 – 23) ÷ 43 (1/an = a-n)
= (27-8) ÷ 64
= 19 ÷ 64
= 19 × 1/64 (1/a ÷ 1/b = 1/a × b/1)
= 19/64
(ii) (32 – 22) × (2/3)-3
= (9 – 4) × (3/2)3 (1/an = a-n)
= 5 × (27/8)
= 135/8
(iii) ((1/2)-1 × (-4)-1)-1
= (21 × (1/-4))-1 (1/an = a-n)
= (1/-2)-1 (1/an = a-n)
= -21
= -2
(iv) (((-1/4)2)-2)-1
= ((-1/16)-2)-1 (1/an = a-n)
= ((-16)2)-1 (1/an = a-n)
= (256)-1 (1/an = a-n)
= 1/256
