Question

The cost of $1$ chart paper is $₹5$ and $1$ marker pen is $₹18$. Neeta needs to buy $6$ chart papers and $6$ marker pens. So, how much money does she need? Also, show the method of solving this problem using suitable property.

Answer 1

Finding the money needed:

Cost of $1$ chart paper is $₹5$

Cost of $6$ chart papers is $₹5\times 6$

Cost of $1$ marker pen is $₹18$

Cost of $6$ marker pens is $₹18\times 6$

Total cost of $6$ chart papers and $6$ marker pens is $₹5\times 6+₹18\times 6$

By using distributive property for addition,

$\text{a×b+a×c=a×(b+c)}$, we get

$\begin{array}{rcl}₹5\times 6+₹18\times 6& =& 6\times (5+18)\\ & =& 6\times 23\\ & =& ₹138\end{array}$

Hence, the total cost of $6$ chart papers and $6$ marker pens is $₹138$

Hence, Neeta needs $₹138$ to buy $6$ chart papers and $6$ marker pens and the method of solving this problem is distributive property.