Question

A shop vendor sold $45$ chips packets, $35$ chocolates and $20$ biscuit packets every day. How many items would he sell in $5$consecutive days?

Answer 1

Finding the number of item sold in $5$ consecutive days:

Number of chips packets sold in one day is $45$

Number of chocolates sold in one day is $35$

Number of biscuit packets sold in one day is $20$

Total number of items sold in one day is $45+35+20$

Therefore, Total number of items sold in $5$consecutive days is $5\times (45+35+20)$

By using associative property for addition,

$\text{a+b+c=a+(b+c)=(a+b)+c}$, we get

$\begin{array}{rcl}45+35+20& =& (45+35)+20\\ & =& 80+20\\ & =& 100\end{array}$

Therefore, $\begin{array}{rcl}5\times (45+35+20)& =& 5\times 100=500\end{array}$

Hence, Total number of items sold in $5$ consecutive days is $500$.