Checking the Answer with Addition

Oct 13, 2025 by wbrum.org 15 views

Introduction

Multiplication and addition are two fundamental concepts in mathematics that are often used in real-world scenarios. In this article, we will explore how Francis, a person with 11 bottles containing 8 ounces of water each, uses multiplication to determine the total amount of water he has. We will then examine which addition equation he could use to check his answer.

Francis's Multiplication Problem

Francis has 11 bottles containing 8 ounces of water each. To determine the total amount of water he has, he multiplies the number of bottles by the amount of water in each bottle. This can be represented as:

11 x 8 = 88

Francis's multiplication problem is a simple example of how multiplication can be used to find the total amount of a quantity. In this case, the quantity is the amount of water in the bottles.

Checking the Answer with Addition

Now that Francis has determined that he has 88 ounces of water, he wants to check his answer using an addition equation. To do this, he needs to add up the amount of water in each bottle. Since he has 11 bottles, he can add 8 together 11 times to get the total amount of water.

However, Francis's addition equation should not be as shown in option A. This is because option A adds up the number of bottles (11) and the amount of water in each bottle (8) separately, rather than adding up the amount of water in each bottle 11 times.

The Correct Addition Equation

The correct addition equation that Francis could use to check his answer is:

8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 88

This equation adds up the amount of water in each bottle 11 times, which is the same as multiplying the number of bottles by the amount of water in each bottle.

Why the Other Option is Incorrect

Option B is also incorrect because it adds up the amount of water in each bottle only 9 times, rather than 11 times. This would result in an incorrect total amount of water.

Conclusion

In conclusion, Francis's multiplication problem is a simple example of how multiplication can be used to find the total amount of a quantity. To check his answer, he can use an addition equation that adds up the amount of water in each bottle 11 times. The correct addition equation is:

8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 88

This equation is a simple example of how addition can be used to check a multiplication problem.

Real-World Applications

Multiplication and addition are used in many real-world scenarios, such as:

Calculating the total cost of items in a shopping cart
Determining the total amount of a quantity, such as the amount of water in a bottle
Checking a multiplication problem using an addition equation

Tips and Tricks

Here are some tips and tricks for using multiplication and addition in real-world scenarios:

Use multiplication to find the total amount of a quantity
Use addition to check a multiplication problem
Make sure to add up the correct number of times when using addition to check a multiplication problem

Common Mistakes

Here are some common mistakes to avoid when using multiplication and addition in real-world scenarios:

Adding up the number of bottles and the amount of water in each bottle separately, rather than adding up the amount of water in each bottle 11 times
Adding up the amount of water in each bottle only 9 times, rather than 11 times

Conclusion

8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 88

Q: What is the difference between multiplication and addition?

A: Multiplication and addition are two fundamental concepts in mathematics that are often used in real-world scenarios. Multiplication is used to find the total amount of a quantity by multiplying the number of items by the amount of each item. Addition, on the other hand, is used to find the total amount of a quantity by adding up the amount of each item.

Q: How do I use multiplication to find the total amount of a quantity?

A: To use multiplication to find the total amount of a quantity, you need to multiply the number of items by the amount of each item. For example, if you have 11 bottles containing 8 ounces of water each, you can multiply 11 by 8 to get the total amount of water.

Q: How do I use addition to check a multiplication problem?

A: To use addition to check a multiplication problem, you need to add up the amount of each item 11 times. For example, if you have 11 bottles containing 8 ounces of water each, you can add 8 together 11 times to get the total amount of water.

Q: What is the correct addition equation to use when checking a multiplication problem?

A: The correct addition equation to use when checking a multiplication problem is to add up the amount of each item 11 times. For example, if you have 11 bottles containing 8 ounces of water each, the correct addition equation is:

8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 88

Q: What are some common mistakes to avoid when using multiplication and addition in real-world scenarios?

A: Some common mistakes to avoid when using multiplication and addition in real-world scenarios include:

Adding up the number of items and the amount of each item separately, rather than adding up the amount of each item 11 times
Adding up the amount of each item only 9 times, rather than 11 times

Q: How can I apply multiplication and addition in real-world scenarios?

A: Multiplication and addition can be applied in many real-world scenarios, such as:

Calculating the total cost of items in a shopping cart
Determining the total amount of a quantity, such as the amount of water in a bottle
Checking a multiplication problem using an addition equation

Q: What are some tips and tricks for using multiplication and addition in real-world scenarios?

A: Some tips and tricks for using multiplication and addition in real-world scenarios include:

Use multiplication to find the total amount of a quantity
Use addition to check a multiplication problem
Make sure to add up the correct number of times when using addition to check a multiplication problem

Q: How can I practice using multiplication and addition in real-world scenarios?

A: You can practice using multiplication and addition in real-world scenarios by:

Using real-world examples, such as calculating the total cost of items in a shopping cart
Practicing addition equations to check multiplication problems
Using online resources and worksheets to practice multiplication and addition problems

Conclusion

In conclusion, multiplication and addition are two fundamental concepts in mathematics that are often used in real-world scenarios. By understanding how to use multiplication and addition, you can apply these concepts in many real-world scenarios. Remember to avoid common mistakes, such as adding up the number of items and the amount of each item separately, and to practice using multiplication and addition in real-world scenarios.