What is 1 + 8?

S1-SA1-0632

Grade Level:

Class 1

Maths, Computing, AI

Definition

What is it?

1 + 8 means adding the number 1 to the number 8. When you add, you are combining two or more numbers to find their total sum.

Simple Example

Quick Example

Imagine you have 1 cricket bat. Your friend gives you 8 more cricket bats. How many bats do you have in total? You simply add 1 and 8 to find the total number of bats.

Worked Example

Step-by-Step

Let's find the sum of 1 + 8.
---Step 1: Start with the first number, which is 1.
---Step 2: Now, add the second number, which is 8, to it.
---Step 3: You can count forward 8 steps from 1. So, 1 then 2, 3, 4, 5, 6, 7, 8, 9.
---Step 4: The number you reach is 9.
---Answer: So, 1 + 8 = 9.

Why It Matters

Understanding simple addition like this is the first step for many advanced fields. In computing, it's how computers perform basic calculations. In AI, simple additions are part of complex algorithms. Even a data scientist uses addition to sum up numbers for analysis.

Common Mistakes

MISTAKE: Counting incorrectly and stopping too early or too late (e.g., saying 1 + 8 = 8). | CORRECTION: Always start counting from the first number and add the exact number of steps for the second number.

MISTAKE: Confusing addition with subtraction (e.g., thinking 1 + 8 means 8 - 1). | CORRECTION: Remember that '+' sign means to combine and find a total, while '-' means to take away.

MISTAKE: Not understanding that the order doesn't matter for addition (e.g., thinking 1 + 8 is different from 8 + 1). | CORRECTION: For addition, 1 + 8 gives the same answer as 8 + 1. It's called the commutative property.

Practice Questions

Try It Yourself

QUESTION: You have 1 ladoo. Your aunt gives you 8 more ladoos. How many ladoos do you have in total? | ANSWER: 9 ladoos

QUESTION: If a bus has 1 passenger, and then 8 more passengers get on at the next stop, how many passengers are on the bus now? | ANSWER: 9 passengers

QUESTION: A small shop sold 1 chai in the morning and 8 chai in the afternoon. If each chai costs Rs. 10, how many chai did they sell in total, and how much money did they make from chai? | ANSWER: Total chai sold = 9. Total money = Rs. 90.

MCQ

Quick Quiz

What is the sum of 1 and 8?

The Correct Answer Is:

When you combine 1 and 8, you get 9. Options A, B, and D are incorrect as they do not represent the correct sum of 1 and 8.

Real World Connection

In the Real World

When you buy groceries, if you pick up 1 packet of biscuits and then 8 more packets of chips, the shopkeeper quickly adds them up to tell you how many items you have. This simple addition is used in every transaction, from buying street food to using a payment app like UPI.

Key Vocabulary

Key Terms

ADDITION: The process of combining numbers to find their total | SUM: The total result obtained from adding numbers | NUMBER: A count or quantity | TOTAL: The whole amount or quantity

What's Next

What to Learn Next

Great job with 1 + 8! Next, you can explore adding larger numbers or adding three numbers together. This will help you build a strong foundation for more complex math problems and real-life calculations.