How many rolls of ribbon did Justin use in all?
Understand the Problem
The question asks how many rolls of ribbon Justin used in total, given that he used fractions of two rolls from his initial three rolls of ribbon.
Answer
Justin used \( \frac{3}{5} \) of a roll of ribbon.
Answer for screen readers
Justin used a total of ( \frac{3}{5} ) of a roll of ribbon.
Steps to Solve
- Identify the amounts of ribbon used Justin used two different fractions of ribbon:
- For the parcel: ( \frac{1}{5} ) of a roll
- For the present: ( \frac{2}{5} ) of another roll
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Add the fractions of ribbon used To find the total amount of ribbon used, add the fractions: $$ \frac{1}{5} + \frac{2}{5} $$
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Perform the addition Since the denominators are the same, simply add the numerators: $$ \frac{1 + 2}{5} = \frac{3}{5} $$
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State the total ribbon used Justin used a total of ( \frac{3}{5} ) of a roll of ribbon.
Justin used a total of ( \frac{3}{5} ) of a roll of ribbon.
More Information
This means that out of the three rolls he initially had, Justin used ( \frac{3}{5} ) of one roll, leaving him with more than two full rolls remaining.
Tips
- Forgetting to add fractions with the same denominator separately.
- Adding the denominators instead of keeping them the same during addition.
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