Question

13. By what number should (-8)-1 be multiplied to get 10-1

Answer 1

$\huge\underlined{\underline{\sf{Answer}}}= \huge\underlined{\sf{\frac{4}{5}}}}} \\\\\huge\underlined{\underline{\sf{Solution-}}$

let number to be multiplied be x.

${\sf-8^-^1$ × $\huge{\sf x = 10^-^1$

$\huge{\sf {\frac{-1}{-8}x = \frac{-1}{10}}}$

$\huge{\sf {x= -\frac{1}{10}}}$ × $\huge{\sf {\frac{8}{-1}}}$

$\huge\underlined{\sf{x = \frac{4}{5} }}$