SOLUTION: Ann bought 30 pens at RS 4.50 each. If she had used this amount of money to buy pencils at 3 for RS 5, how many pencils could she have bought? I have solved this question, the a

Question 585034: Ann bought 30 pens at RS 4.50 each. If she had used this amount of money to buy pencils at 3 for RS 5, how many pencils could she have bought?
I have solved this question, the answer is 81 but I have to explain to the 5th grade student. What is the easiest way to explain?
Thanks.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
How much money did Ann need to buy 30 pens?
If each one is Rs 4.50, she needed
= Rs 135
Imagine that she has the Rs 135 in her hand
and hasn't bought anything yet.
For every Rs 5 in her hand, she can buy 3 pencils
135 divided by 5 is 27. So, 27 is how many times
she can buy 3 pencils.
3 pencils times 27 = 81 pencils
Hope this helps

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