Question

Evaluate:
$(5^{-1}\times 2^{-1})\times 6^{-1}$
[1 mark]

Answer 1

$(5^{-1}\times 2^{-1})\times 6^{-1}=(\frac{1}{5}\times \frac{1}{2})\times \frac{1}{6}[\because a^{-m}=\frac{1}{a^m}]$
[0.5 mark]
$=\frac{1}{10}\times \frac{1}{6}=\frac{1}{60}$
[0.5 mark]