Monica Capoor Solutions for Exercise 14: Checkpoint

Write the multiplicative inverse of $\frac{-2}{7}$.

Write the multiplicative inverse of $9$.

Write the multiplicative inverse of $\frac{6}{-10}$.

Divide $\frac{7}{9}$ by $\frac{5}{3}$

Simplify $\left(3\frac{4}{5}-2\frac{1}{5}\right)÷\left(7\frac{9}{10}-3\frac{1}{10}\right)$

Given that $ab=\frac{-2}{5}$ and $b=\frac{-1}{8}$, find $a$.

Evaluate $\left(a÷b\right)\times ab,$ if $a=\frac{1}{5}$ and $b=\frac{2}{5}$.

$\frac{3}{5}$ of my birthday cake was consumed yesterday. What equal part of remaining cake will each of my $5$ friend will get?