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Chapter 1: Problem 49

Subtract, then check the answer by using addition. $$8-3 \quad \text { Check: } \square+3=8$$

Short Answer

Expert verified
8 - 3 = 5; Check: 5 + 3 = 8

Step by step solution

01

Perform the Subtraction

To solve the problem, start by subtracting 3 from 8. 8 - 3 = 5
02

Check the Answer with Addition

To verify the result, add the answer obtained in Step 1 (which is 5) to 3. The sum should equal the original number, which is 8. 5 + 3 = 8
03

Conclusion

Since the sum of 5 and 3 equals 8, the subtraction result of 8 - 3 is correct.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

subtraction verification
Subtraction verification is a method to ensure that your subtraction result is accurate. By verifying, you avoid mistakes that can occur from simple oversights. To check if your subtraction is correct, you can use a simple addition step. After performing the subtraction, add the result to the subtracted number. If it equals the original number, your subtraction is correct. For example, if we subtract 3 from 8 and get 5, we can verify this by adding 5 back to 3. Since 5 + 3 equals 8, our subtraction is verified.
addition for checking
Checking a subtraction problem with addition is a reliable way to confirm your answer. When you add the result of your subtraction problem to the number you subtracted, the sum should be the original number.
Here's how you can do it:
  • First, subtract the given numbers (for instance, 8 - 3).
  • Next, take the result (which is 5 in this case) and add it to the number that you subtracted (which is 3).

If the addition of these two numbers equals your starting number (8 in this case), then your subtraction is correct. This is an essential technique in elementary math to ensure the accuracy of your results.
basic arithmetic operations
Basic arithmetic operations are the foundation of math. They include addition, subtraction, multiplication, and division. Understanding these concepts is crucial for solving various math problems. Each operation has its unique method and purpose.
  • Addition: Combining two or more numbers to get a total.
  • Subtraction: Taking one number away from another to find the difference.
  • Multiplication: Repeated addition of the same number.
  • Division: Splitting a number into equal parts.

In our example, we used subtraction and addition. Subtraction helped us find how many are left when 3 is taken from 8. Addition helped us verify that our answer was correct.
elementary math skills
Elementary math skills form the basis of a student's math education. These skills include understanding numbers, counting, basic operations, and recognizing patterns. They are essential for progressing to more advanced math topics. Mastering these skills requires practice and the ability to verify one's work to ensure accuracy.
  • Counting: Knowing how to count in sequence.
  • Basic Operations: Addition, subtraction, multiplication, and division.
  • Problem Solving: Using logic and arithmetic to solve simple problems.
  • Verification: Double-checking work using techniques like addition for subtraction verification.

Practicing subtraction problems and then checking them using addition helps solidify these elementary math skills. It encourages careful work and the habit of checking results for accuracy, which is invaluable in all areas of math.

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Most popular questions from this chapter

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