## Subtraction of time

 5.5 Subtraction of time

 Class Time Piano 180 minutes Dance 300 minutes

How much longer is the time for the dance class than the piano class?

Mathematical sentence: $$300\space\text{minit}\space-\space180\space\text{minit}\space=\underline{\quad\quad}\,\text{minit}$$

$$\begin{array} {rr} \small{\color{red}{2}}\, \small{\color{red}{10}}\quad\quad\;\;\;\;\; \\\;\;\cancel{3}\;\cancel{0}\;0\;\text{minutes} \\-\;\;\;1\;8\;0\;\text{minutes} \\\hline\;\;1\;2\;0\;\text{minutes}\\\hline \end{array}$$

So, the dance class is 120 minutes longer than the piano class.

## Subtraction of time

 5.5 Subtraction of time

 Class Time Piano 180 minutes Dance 300 minutes

How much longer is the time for the dance class than the piano class?

Mathematical sentence: $$300\space\text{minit}\space-\space180\space\text{minit}\space=\underline{\quad\quad}\,\text{minit}$$

$$\begin{array} {rr} \small{\color{red}{2}}\, \small{\color{red}{10}}\quad\quad\;\;\;\;\; \\\;\;\cancel{3}\;\cancel{0}\;0\;\text{minutes} \\-\;\;\;1\;8\;0\;\text{minutes} \\\hline\;\;1\;2\;0\;\text{minutes}\\\hline \end{array}$$

So, the dance class is 120 minutes longer than the piano class.