Gabriela's Purchase Calculate Bike And Tablet Cost & Change

by Scholario Team 60 views

Hey guys! Let's break down Gabriela's shopping trip and figure out her change. She bought a bike and a tablet, paid with some bills, and now we need to calculate her troco, or change. This is a classic math problem that mixes addition and subtraction, something super useful in everyday life. Let's dive in!

Gabriela's Shopping Spree

The Cost of the Items

First things first, let's figure out how much Gabriela spent in total. This is where our addition skills come into play. She bought a bike for R$ 1.250 and a tablet for R$ 70. So, we need to add these two amounts together:

R$ 1.  250 (bike) + R$ 70 (tablet) = R$ 1.320

So, Gabriela spent a total of R$ 1.320 on her new bike and tablet. See? Math isn't just for the classroom; it helps us in real-world scenarios like shopping!

The Payment

Next up, we need to know how much money Gabriela used to pay. The problem states that she paid with three R$ 100 bills. Let's calculate the total amount:

3 cédulas * R$ 100/cédula = R$ 300

Gabriela paid with R$ 300. We're halfway there, guys! Now we just need to figure out the change.

Calculating the Troco (Change)

Now comes the final step: calculating Gabriela's change. To do this, we need to subtract the total cost of the items (R$ 1.320) from the amount she paid (R$ 300). This is where our subtraction skills shine:

R$ 300 (payment) - R$ 1.320 (total cost) = ?

Wait a minute! It seems like Gabriela didn't pay enough to cover the cost of the items. R$ 300 is less than R$ 1.320. There must be a mistake in the problem statement. Let's assume Gabriela paid with more money, maybe three R$ 500 bills instead of three R$ 100 bills. This makes the problem more realistic and gives us a chance to practice our subtraction.

Let's recalculate the payment with the corrected information:

3 cédulas * R$ 500/cédula = R$ 1.500

Now Gabriela paid with R$ 1.500. Let's calculate the change again:

R$ 1.  500 (payment) - R$ 1.320 (total cost) = R$ 180

So, if Gabriela paid with R$ 1.500, her change would be R$ 180. However, based on the original problem, there seems to be an error. Let's proceed with the initial information and highlight the discrepancy.

Identifying the Correct Answer (Based on the Erroneous Data)

Going back to the original problem, we know Gabriela paid with R$ 300 and spent R$ 1.320. Since she didn't pay enough, the problem as stated doesn't have a logical solution for the change. The provided alternatives (A) R$ 20, (B) R$ 30, (C) R$ 50, and (D) R$ 80 are all incorrect given the initial information.

It's super important to double-check the problem statement and ensure all the numbers make sense. In this case, the payment amount needs to be higher than the total cost to have a valid change calculation.

Key Concepts: Addition and Subtraction

This problem highlights two fundamental math operations: addition and subtraction. These are the building blocks for many other math concepts and are used constantly in our daily lives.

  • Addition: We use addition to combine quantities. In this problem, we added the cost of the bike and the tablet to find the total cost. Think of addition as putting things together.
  • Subtraction: Subtraction is the opposite of addition. We use it to find the difference between two quantities. In this problem, we subtracted the total cost from the payment amount to find the change. Think of subtraction as taking away.

Why These Skills Matter

Understanding addition and subtraction isn't just about getting good grades in math class. It's about being able to manage your money, calculate discounts, figure out cooking measurements, and so much more. These skills empower you to make informed decisions and navigate the world with confidence. It's essential to practice and master these basic operations.

Real-World Applications

Let's think about other situations where addition and subtraction are essential:

  • Budgeting: Planning your expenses involves adding up your income and subtracting your bills. Understanding these operations helps you stay on track with your financial goals.
  • Cooking: Recipes often require you to adjust measurements. If you're doubling a recipe, you need to multiply (which is repeated addition). If you're halving a recipe, you need to divide (which is related to subtraction).
  • Travel: Calculating travel time, distance, and fuel costs involves addition and subtraction. You might need to add up different legs of a journey or subtract the distance traveled from the total distance.
  • Sales and Discounts: Figuring out the sale price of an item involves subtracting the discount amount from the original price. Knowing how to do this ensures you're getting the best deal.

Conclusion: Double-Check and Keep Practicing!

So, while the original problem had a bit of a snag, it gave us a fantastic opportunity to review addition and subtraction. Remember, it's crucial to double-check the information you're given to make sure it makes sense. And keep practicing these basic operations; they'll serve you well in countless situations!

If we correct the problem to say Gabriela paid with R$ 1.500, then her change would be R$ 180. But based on the initial information, the problem highlights the importance of ensuring the payment covers the cost. Keep those math skills sharp, guys!

Calculate Gabriela's total expenses and the change she received after buying a bicycle for R$ 1,250 and a tablet for R$ 70, paying with 3 bills of R$ 100.

Gabriela's Purchase Calculate Bike and Tablet Cost & Change