What is Subtracting from Nineteen?

S0-SA1-1355

Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

Subtracting from nineteen means taking away a certain number from the number nineteen. It helps us find out how much is left after we remove a part from nineteen. It's a basic subtraction problem where 19 is always the starting number.

Simple Example

Quick Example

Imagine you have 19 ladoos in a box. If your friend eats 5 ladoos, how many are left? To find out, you subtract 5 from 19. So, 19 - 5 = 14 ladoos are remaining.

Worked Example

Step-by-Step

Let's find out what 19 minus 7 is.
1. Start with the number 19.
---2. We need to take away 7 from 19.
---3. You can count backwards 7 steps from 19: 18, 17, 16, 15, 14, 13, 12.
---4. Alternatively, align the numbers by place value:
19
- 7
-----
---5. Subtract the ones digit: 9 - 7 = 2.
---6. The tens digit (1) remains as there's no tens digit to subtract from 7.
---7. Combine the results: 1 ten and 2 ones make 12.
---So, 19 - 7 = 12.

Why It Matters

Understanding how to subtract from a number like nineteen is a building block for all math. It's crucial for managing money, calculating distances, or even figuring out cricket scores. This skill is used by shopkeepers, engineers, and even astronauts!

Common Mistakes

MISTAKE: Subtracting the larger number from the smaller number when the order is fixed (e.g., 7 - 19 instead of 19 - 7). | CORRECTION: Always subtract the given number FROM 19, meaning 19 is always the first number in the subtraction.

MISTAKE: Counting incorrectly when using fingers or mental math, like skipping a number or counting an extra one. | CORRECTION: Double-check your counting. You can use number lines or physical objects to verify your answer.

MISTAKE: Forgetting to subtract from the tens place if the number being subtracted has a tens digit (though not relevant for numbers less than 10). | CORRECTION: Always subtract digit by digit, starting from the ones place, and then moving to the tens place if applicable.

Practice Questions

Try It Yourself

QUESTION: You had 19 stickers. You gave 6 stickers to your sister. How many stickers are left? | ANSWER: 13

QUESTION: A bus started with 19 passengers. At the first stop, 8 passengers got off. How many passengers are still on the bus? | ANSWER: 11

QUESTION: You want to buy a toy that costs 19 rupees. You have 12 rupees with you. How many more rupees do you need to save? | ANSWER: 7

MCQ

Quick Quiz

What is the result when you subtract 4 from 19?

The Correct Answer Is:

Subtracting 4 from 19 means 19 - 4. Counting back 4 from 19 gives 18, 17, 16, 15. So, the correct answer is 15.

Real World Connection

In the Real World

When you're checking your mobile data usage, if you started with 19 GB and used 5 GB, your phone calculates 19 - 5 to show you 14 GB remaining. Similarly, a shopkeeper calculates change when you pay with a 20 rupee note for something costing 1 rupee, essentially doing 19 - (cost + 1) to figure out change from 20.

Key Vocabulary

Key Terms

SUBTRACT: To take one number away from another | NINETEEN: The number after eighteen and before twenty | DIFFERENCE: The result of subtracting one number from another | REMAINDER: What is left after subtraction

What's Next

What to Learn Next

Once you're comfortable with subtracting from nineteen, you can move on to 'Subtracting from Twenty' or 'Subtracting Two-Digit Numbers'. These concepts will build on what you've learned here, making you a math pro!