What is 8 × 10?

S1-SA1-0711

Grade Level:

Class 3

Maths, Computing, AI

Definition

What is it?

8 × 10 means adding the number 8, ten times. It is a basic multiplication problem that helps you understand how numbers grow quickly when you multiply them. This concept shows you how to find the total when you have 8 groups of 10 items.

Simple Example

Quick Example

Imagine you have 8 friends, and each friend gives you 10 rupees for a class project. To find out the total money you have, you would multiply 8 by 10. You would have 80 rupees in total.

Worked Example

Step-by-Step

Let's calculate 8 × 10 step-by-step:
Step 1: Understand that multiplication is repeated addition. So, 8 × 10 means adding 10, eight times.
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Step 2: Write it out: 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10
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Step 3: Start adding: 10 + 10 = 20
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Step 4: Continue adding: 20 + 10 = 30
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Step 5: Continue adding: 30 + 10 = 40
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Step 6: Continue adding: 40 + 10 = 50
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Step 7: Continue adding: 50 + 10 = 60
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Step 8: Continue adding: 60 + 10 = 70
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Step 9: Final addition: 70 + 10 = 80
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Answer: So, 8 × 10 = 80.

Why It Matters

Understanding multiplication is key for many advanced topics in Maths, Computing, and AI. Engineers use it to design circuits, data scientists use it to analyze large datasets, and even AI programs use it for complex calculations like image recognition. It's a foundational skill for future innovators!

Common Mistakes

MISTAKE: Thinking 8 × 10 is the same as 8 + 10 (which is 18) | CORRECTION: Remember that '×' means multiplication, which is repeated addition, not simple addition.

MISTAKE: Forgetting that multiplying by 10 means adding a zero to the number | CORRECTION: When you multiply any whole number by 10, you simply write the number and put a zero at the end (e.g., 8 × 10 = 80).

MISTAKE: Confusing the order, like thinking 8 × 10 is different from 10 × 8 | CORRECTION: The commutative property of multiplication states that changing the order of the numbers does not change the product (8 × 10 = 10 × 8 = 80).

Practice Questions

Try It Yourself

QUESTION: What is 7 × 10? | ANSWER: 70

QUESTION: If a bus ticket costs 10 rupees, how much will 9 tickets cost? | ANSWER: 90 rupees

QUESTION: A baker makes 10 cakes every hour. How many cakes will he make in 6 hours? | ANSWER: 60 cakes

MCQ

Quick Quiz

Which of these is another way to write 8 × 10?

8 + 10

10 + 10 + 10 + 10 + 10 + 10 + 10 + 10

8 + 8 + 8 + 8 + 8 + 8 + 8 + 8

10 - 8

The Correct Answer Is:

Option B correctly shows 10 added 8 times, which is the definition of 8 × 10. Options A and D are incorrect operations, and Option C shows 8 added 10 times, which is 10 × 8, not 8 × 10.

Real World Connection

In the Real World

When you buy 8 packets of biscuits, and each packet costs 10 rupees, the shopkeeper quickly calculates the total as 80 rupees using this multiplication. Similarly, delivery apps like Swiggy or Zomato use multiplication to calculate total order costs when you order multiple items of the same price.

Key Vocabulary

Key Terms

MULTIPLICATION: A way to find the total of equal groups or repeated addition | PRODUCT: The answer you get when you multiply two or more numbers | REPEATED ADDITION: Adding the same number multiple times | FACTORS: The numbers you multiply together to get a product

What's Next

What to Learn Next

Great job understanding 8 × 10! Next, you should explore multiplying by other numbers, like 8 × 100 or 8 × 20. This will help you multiply bigger numbers and understand place value even better!