![]() Disadvantage: they could steal your money and you have to pay them.Advantage: potentially faster than the previous two methods but still time consuming.You could hire multiple people to count them for you.Disadvantage: also very time consuming as you can only put stacks of up to 130 bills at a time.Advantage: potentially the most accurate if you don’t lose track of the running total.You could count the bills using an electric bill counter (as clearly you would be able to afford one!).Advantage: very accurate if you don’t lose track of the running total.You could count each bill, one at a time.So, after getting students’ guesses, be sure to have a long talk around “What options do you have for counting this money and what are the advantages and disadvantages to each method?” Here are my thoughts on what students might say: The most important part of this lesson will be the mathematical modeling conversation regarding how to go about counting the money. Looking at Picture 1 (with help from Picture 2) it looks like the pile has 34 columns of bills.Looking at Picture 1 (with help from Picture 3) it looks like the main stack of bills go back 11 rows with a slightly less high 12th row in the front.I am ignoring the colorful money in front of the United States bills as they do not appear to be US currency.My assumption is that all of the United States bills are $100 bills.These pictures give a much clearer picture of how much money there actually is. How do you count money when there is so much it is “stuffed to the ceiling?” It is a problem that I wish I had. How important is it that we have an accurate answer?. ![]() How can we measure the volume of $100 bills in the pile?.What options do you have for counting this money and what are the advantages and disadvantages to each method?.These questions may be useful in helping students down the problem solving path:
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