Question

Find the sum of the following numbers by suitable arrangements:

$65;32;584;69,823;475$

Answer 1

Grouping the numbers, we get

$$\begin{gathered} \left(69,823+32\right)+\left(475+65\right)+584 \\ =69,855+\left(540+584\right) \\ =69,855+1,124 \\ =70,979 \end{gathered}$$