Addition and subtraction word problems – up to 100

key notes :

🔢 Understanding Word Problems

  • Word problems are math stories using numbers.
  • Read the problem carefully at least two times.
  • Find out what is given and what is asked.

➕ When to Use Addition

Use addition when we:

  • Put together
  • Add more
  • Find total

Look for clue words:

  • altogether, in all, total, sum, together

👉 Example:
Ravi has 25 apples. He buys 30 more. How many apples now?
➡️ 25 + 30 = 55

➖ When to Use Subtraction

Use subtraction when we:

  • Take away
  • Find how many left
  • Compare

Look for clue words:

  • left, fewer, take away, minus, difference

👉 Example:
There are 80 candies. 35 are eaten. How many are left?
➡️ 80 − 35 = 45

🧠 Steps to Solve

  1. Read the question
  2. Understand (What do we know?)
  3. Choose operation (➕ or ➖)
  4. Solve the problem
  5. Write the answer with units

📏 Numbers Up to 100

  • All numbers are less than or equal to 100
  • Practice adding and subtracting 2-digit numbers

✏️ Important Tips

  • Always write number sentences
  • Check your answer
  • Use drawings or objects if needed
  • Keep numbers neatly arranged

🎯 Practice Idea

Use daily life examples:

  • Toys, fruits, pencils, money 💰

Learn with an example

💡 Ted had 44 letters. Then 2 more came in the post.

How many letters does Ted have now?

____ letters

  • Add the numbers of letters.
  • Add: 44 + 2=
  • You can count up to add. Start from 44 and count up 2:
  • 44, 45, 46
  • 44 + 2=46
  • The sum is 46. Ted now has 46 letters.

💡 Susan is building a cabinet. She needs 33 one-inch bolts and 12 one-and-a-half-inch bolts.

How many bolts in all does Susan need?

___ bolts

  • Add the number of bolts.
  • Add: 33 + 12
  • Add the ones. Add 3 + 2.
  • 3 3 + 1 2=5
  • Add the tens. Add 3 + 1.
  • 3 3 + 1 2= 4 5
  • The sum is 45. Susan needs 45 bolts in all.

💡 A car dealer has a total of 97 cars. He has 56 new cars.

How many used cars does the dealer have?

____ used cars

  • Subtract the number of new cars from the total number of cars.
  • Subtract:
  • 97 − 56
  • Subtract the ones.
  • 9 7 – 5 6=1
  • Subtract the tens.
  • 9 7 – 5 6= 4 1
  • The difference is 41. The dealer has 41 used cars.

Let’s practice!🖊️