Question

Show your calculation and explain how the base 60 number system is used to subtract 48 minutes from 2 hour 13 minutes.

My calculation (3)

Explanation of my steps (3)

 

 

Answer 1

$$\begin{matrix} & 2h &13min \\ - \\ & & 48min \end{matrix}$$

$1h=60min$

$$\begin{matrix} & (2-1)h &(13+60)min \\ - \\ & & 48min \end{matrix}$$

$$\begin{matrix} & 1h &73min \\ - \\ & & 48min \\ \hdashline \\ & 1h &25min \\ \end{matrix}$$