Question

How much money will Dinu pay for 4 kg brass? _________
Guess the answer first.

Answer 1

Cost of 1 kg brass = Rs 180
Cost of 4 kg brass = Rs 4×180
= Rs 720
We will do it as follows:



Add the numbers in the box

$$\begin{gathered} \begin{array}{cccc}& 4& 0& 0\\ +& 3& 2& 0\end{array} \\ \underline{\overline{\begin{array}{cccc}& 7& 2& 0\end{array}}} \end{gathered}$$

Thus, Dinu will pay Rs 720 for 4 kg brass.