What is 9 × 10?

S1-SA1-0715

Grade Level:

Class 3

Maths, Computing, AI

Definition

What is it?

9 × 10 means you are adding the number 9, ten times. It is a basic multiplication problem where you find the product of 9 and 10. The '×' symbol means 'multiplied by' or 'times'.

Simple Example

Quick Example

Imagine you have 9 ladoos in one box. If you have 10 such boxes, how many ladoos do you have in total? You would multiply 9 by 10 to find the total number of ladoos.

Worked Example

Step-by-Step

Let's find the answer to 9 × 10 using repeated addition: --- Step 1: We need to add the number 9, ten times. --- Step 2: Write it out: 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 --- Step 3: Start adding: 9 + 9 = 18 --- Step 4: 18 + 9 = 27 --- Step 5: 27 + 9 = 36 --- Step 6: 36 + 9 = 45 --- Step 7: 45 + 9 = 54 --- Step 8: 54 + 9 = 63 --- Step 9: 63 + 9 = 72 --- Step 10: 72 + 9 = 81 --- Step 11: 81 + 9 = 90. So, 9 × 10 = 90.

Why It Matters

Understanding multiplication like 9 × 10 is super important for Maths, Computing, and even AI. Engineers use it to calculate forces, programmers use it in game development, and data scientists use it to process large datasets. It's a foundational skill for many exciting careers!

Common Mistakes

MISTAKE: Confusing multiplication with addition, e.g., saying 9 × 10 = 9 + 10 = 19 | CORRECTION: Remember multiplication is repeated addition. 9 × 10 means 9 added 10 times, not just 9 plus 10.

MISTAKE: Forgetting that multiplying by 10 means adding a zero at the end of the number, e.g., 9 × 10 = 91 | CORRECTION: When you multiply any whole number by 10, simply write the number and put a zero at the end. So, 9 becomes 90.

MISTAKE: Incorrectly recalling the multiplication table for 9 or 10, e.g., saying 9 × 10 = 80 | CORRECTION: Practice your multiplication tables regularly. You can also use repeated addition or count by tens (10, 20, 30... up to 90) to check your answer.

Practice Questions

Try It Yourself

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

QUESTION: If you buy 9 packs of pencils, and each pack has 10 pencils, how many pencils do you have in total? | ANSWER: 90 pencils

QUESTION: A bus ticket costs 10 rupees. If 9 friends each buy one ticket, and then one more friend joins and buys a ticket, how much money is spent in total? | ANSWER: 100 rupees (9 friends x 10 rupees = 90 rupees; 1 more friend x 10 rupees = 10 rupees; 90 + 10 = 100 rupees)

MCQ

Quick Quiz

What is the product of 9 and 10?

109

910

The Correct Answer Is:

The product of 9 and 10 means 9 multiplied by 10. This equals 90. Options A, C, and D are incorrect as they represent addition or incorrect multiplication.

Real World Connection

In the Real World

Imagine you are building a budget for your school trip. If 9 students each contribute 10 rupees for a snack, you can quickly calculate that 9 × 10 = 90 rupees are collected. This helps the trip organizer know how much money they have for snacks.

Key Vocabulary

Key Terms

MULTIPLICATION: A mathematical operation that is essentially repeated addition | PRODUCT: The result of multiplying two or more numbers | TIMES: Another word for multiplication, meaning 'multiplied by' | FACTOR: A number that divides another number exactly, or a number being multiplied (like 9 and 10 in 9x10)

What's Next

What to Learn Next

Great job understanding 9 × 10! Next, you should explore multiplying larger numbers by 10, like 25 × 10, and then move on to multiplying by other two-digit numbers. This will build your skills for solving even bigger math problems!