Question

From a rope of length $80m$, a piece of $27m35cm$ is cut. What is the length of the remaining rope?

Answer 1

The length of remaining rope can be calculated as $80m-27m35cm$.

Step 1. Converting the given decimal number into like units and like decimals,

we get $\begin{array}{rcl}80m& =& 80\times 100cm\\ & =& 8000cm\\ 27m35cm& =& \left(27\times 100+35\right)cm\\ & =& 2700+35cm\\ & =& 2735cm\end{array}$

Step 2. Write down the numbers, one under the other in one column.

$$\begin{gathered} 8000 \\ -2735 \\ —— \\ 5265 \end{gathered}$$

Hence, the result is $5265cm$ or $52m65cm$