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Chapter 1: Problem 51

Subtract, then check the answer by using addition. $$4-1 \quad \text { Check: } \square+1=4$$

Short Answer

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Step by step solution

01

- Subtract 1 from 4

Start with the number 4 and subtract 1 from it. Perform the subtraction: \[ 4 - 1 = 3 \]
02

- Check the answer using addition

In the original subtraction, you got the result 3. Now check if adding 1 to 3 returns to 4. Perform the addition:\[ 3 + 1 = 4 \]Since the addition returns to the original number 4, the subtraction was correct.

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Key Concepts

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

subtraction
Subtraction is an essential arithmetic operation. It is the process of finding the difference between two numbers. In the example given, we start with the number 4 and aim to subtract 1.
  • Identify the larger number (minuend) and the smaller number (subtrahend).
  • Subtract the subtrahend (1) from the minuend (4).
This gives us: \[ 4 - 1 = 3 \]
This means that 3 is the difference between 4 and 1. Remember, subtraction is about taking away or finding how much more one number is compared to another.
addition
Addition is another fundamental arithmetic operation. It involves combining two or more numbers to get a total sum. It's the inverse operation of subtraction.
  • Start with the number you got from the subtraction (in this case, 3).
  • Add the same number that was initially subtracted (1).
This process can be illustrated as: \[ 3 + 1 = 4 \]
Adding 3 and 1 returns you to the original number 4. This confirms that the subtraction was done correctly. Addition helps verify the accuracy of subtraction.
checking subtraction with addition
It's always a good idea to check your subtraction results using addition. This method ensures your answer is correct and confirms your understanding of both operations.
  • After subtracting, take the result.
  • Add the subtracted number back to this result.
In our example:
\[ 4 - 1 = 3 \]
Now check by adding:
\[ 3 + 1 = 4 \]
Since adding the subtracted number (1) to the result (3) returns the original number (4), the subtraction was accurate. This simple check helps reinforce the concepts and builds confidence in performing mathematical operations.

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