What is 8 + 9?

S1-SA1-0656

Grade Level:

Class 1

Maths, Computing, AI

Definition

What is it?

8 + 9 means we are combining the number 8 with the number 9. It's a basic addition problem where we find the total when these two numbers are put together.

Simple Example

Quick Example

Imagine you have 8 laddoos on one plate and your friend gives you 9 more laddoos. To find out how many laddoos you have in total, you would add 8 and 9.

Worked Example

Step-by-Step

Let's find the answer to 8 + 9.
---Step 1: Start with the first number, which is 8.
---Step 2: Now, count forward 9 times from 8. You can use your fingers or draw lines.
---Step 3: After 8, counting 1 more is 9. Counting 2 more is 10. Counting 3 more is 11. Counting 4 more is 12. Counting 5 more is 13. Counting 6 more is 14. Counting 7 more is 15. Counting 8 more is 16. Counting 9 more is 17.
---Step 4: So, when you add 9 to 8, you reach 17.
---Answer: 8 + 9 = 17

Why It Matters

Understanding addition like 8 + 9 is the first step for all advanced Maths. In Computing, this basic logic helps computers add big numbers very fast. Even in AI, simple additions are building blocks for complex calculations, used by data scientists to make smart programs.

Common Mistakes

MISTAKE: Students sometimes count from 8 only 8 times instead of 9 times. | CORRECTION: Always double-check how many numbers you need to count forward.

MISTAKE: Getting confused when counting past 10. For example, counting 8, 9, 10, then jumping to 12. | CORRECTION: Practice counting numbers in sequence regularly, especially across tens (like 9, 10, 11).

MISTAKE: Forgetting to include the starting number when counting. For example, thinking 8 + 1 is 9, but then when adding 9, starting the count from 9 itself. | CORRECTION: Always start counting 'forward' from the first number, not 'at' the first number.

Practice Questions

Try It Yourself

QUESTION: What is 7 + 6? | ANSWER: 13

QUESTION: A bus had 12 passengers. At the next stop, 5 more passengers got on. How many passengers are on the bus now? | ANSWER: 17

QUESTION: Your mother bought 9 apples and your father bought 8 oranges. How many fruits did they buy in total? | ANSWER: 17

MCQ

Quick Quiz

What is the sum of 8 and 9?

The Correct Answer Is:

The correct answer is 17. When you combine 8 and 9, you get a total of 17. Options A, C, and D are incorrect sums.

Real World Connection

In the Real World

When you're playing cricket with friends and one team scores 8 runs and another scores 9 runs, knowing 8 + 9 helps you quickly figure out the total runs scored if you combine their scores. Or, if you buy a chai for 8 rupees and a biscuit for 9 rupees, you add them up to know the total amount to pay.

Key Vocabulary

Key Terms

ADDITION: The process of combining numbers to find a total | SUM: The result you get after adding numbers | TOTAL: The whole amount or number | COMBINE: To put two or more things together

What's Next

What to Learn Next

Now that you understand basic addition, you can learn about adding three numbers or larger numbers. This will help you solve more complex problems in daily life and in your future Maths lessons.