What is 7 × 10?

S1-SA1-0706

Grade Level:

Class 3

Maths, Computing, AI

Definition

What is it?

7 × 10 means adding the number 10, seven times. It is a basic multiplication problem where you find the product of 7 and 10. This concept helps you quickly calculate how much you get when you have 7 groups of 10.

Simple Example

Quick Example

Imagine you have 7 friends, and each friend gets 10 ladoos. To find out the total number of ladoos, you would calculate 7 × 10. This tells you that all your friends together have 70 ladoos.

Worked Example

Step-by-Step

Let's calculate 7 × 10 step-by-step:
1. Multiplication means repeated addition. So, 7 × 10 is the same as adding 10, seven times.
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2. Write it out: 10 + 10 + 10 + 10 + 10 + 10 + 10
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3. Add the first two 10s: 10 + 10 = 20
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4. Add the next 10: 20 + 10 = 30
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5. Continue adding: 30 + 10 = 40
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6. Keep going: 40 + 10 = 50
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7. Almost there: 50 + 10 = 60
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8. Final step: 60 + 10 = 70
So, 7 × 10 = 70.

Why It Matters

Understanding multiplication helps you solve problems faster in daily life and is super important for higher studies. In Computing, it's used in algorithms that process data. AI uses multiplication for complex calculations, like making self-driving cars understand their surroundings. These skills are crucial for careers in software development, data science, and engineering.

Common Mistakes

MISTAKE: Adding 7 and 10 to get 17. | CORRECTION: Remember that 'x' means multiplication, which is repeated addition, not just simple addition.

MISTAKE: Thinking 7 × 10 is the same as 7 + 7 + 7... (10 times). | CORRECTION: The first number tells you how many times to add the second number. So, it's 10 added 7 times.

MISTAKE: Forgetting that multiplying by 10 means adding a zero at the end of the other number. | CORRECTION: Always remember the 'multiply by 10' rule: just put a zero at the end of the number you are multiplying by 10 (e.g., 7 becomes 70).

Practice Questions

Try It Yourself

QUESTION: What is 5 × 10? | ANSWER: 50

QUESTION: A auto-rickshaw driver charges Rs. 10 for every kilometer. How much will he charge for a 9-kilometer ride? | ANSWER: Rs. 90

QUESTION: If you have 6 boxes, and each box contains 10 pencils, how many pencils do you have in total? If you then give away 20 pencils, how many are left? | ANSWER: 60 pencils - 20 pencils = 40 pencils left.

MCQ

Quick Quiz

Which of these is the correct way to calculate 7 × 10?

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

7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7

7 + 10

10 - 7

The Correct Answer Is:

Option A correctly shows 10 being added 7 times, which is the definition of 7 × 10. Option B adds 7 ten times, which is 10 × 7. Option C is addition, and Option D is subtraction.

Real World Connection

In the Real World

When you buy 7 packets of biscuits, and each packet costs Rs. 10, you quickly use 7 × 10 to know the total cost is Rs. 70. Or, if a delivery app like Swiggy charges Rs. 10 per item for packing, and you order 7 items, the app calculates 7 × 10 to show your packing fee.

Key Vocabulary

Key Terms

MULTIPLICATION: A mathematical operation where a number is added to itself a number of times | PRODUCT: The result of multiplying two or more numbers | REPEATED ADDITION: Adding the same number multiple times | FACTOR: Numbers that are multiplied together to get a product

What's Next

What to Learn Next

Great job understanding 7 × 10! Now, you can explore multiplying by other numbers like 100 or 1000. This will help you understand place value better and make even bigger calculations super easy!