Addition and Subtraction

🔹 What Is Addition?

Addition means putting numbers together to find a total.

Example:
If you have 245 books and your friend gives you 130 more,
you add them to find the total:

245 + 130 = 375

🔹 What Is Subtraction?

Subtraction means taking away from a number to find what is left or the difference.

Example:
If you had 400 pencils and used 125,
you subtract to find how many are left:

400 − 125 = 275

🧠 Clue to Remember

• Addition makes numbers bigger (putting together)
  
  

• Subtraction makes numbers smaller (taking away)
  
  

We use these every day — in counting, shopping, building, and comparing.

💡 Why It Matters

• Helps us solve real-world problems
  
  

• Helps with money, time, and measurement
  
  

• Needed for multi-step word problems
  
  

• Forms the base for multiplication, division, and algebra
  
  

✏️ Place Value Tip

When adding or subtracting big numbers,
line up the digits by place value: ones, tens, hundreds, and so on.

Example:

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 536

+ 218

_____

  754

Line up the digits and work from right to left, regrouping if needed.

✅ Quick Practice

Add or Subtract:

1. 521 + 134 = ?
   
   

2. 900 − 245 = ?
   
   

3. 187 + 609 = ?
   
   

4. 700 − 356 = ?
   
   

✅ Answers:

1. 655
   
   

2. 655
   
   

3. 796
   
   

4. 344
   
   

🧩 Common Mistakes

• Forgetting to line up place values
  
  

• Not borrowing correctly in subtraction
  
  

• Rushing without checking the answer
  
  

🔒 In Pink Grade Pro: