What is 2 × 5?

S1-SA1-0661

Grade Level:

Class 2

Maths, Computing, AI

Definition

What is it?

2 × 5 means adding the number 2, five times. It's a basic multiplication problem where you find the total when you have 5 groups of 2 items each. This helps us count things faster than adding repeatedly.

Simple Example

Quick Example

Imagine you have two friends, and each friend has 5 lollipops. To find the total number of lollipops, you can do 2 × 5. This tells you how many lollipops there are in all.

Worked Example

Step-by-Step

Let's calculate 2 × 5.

Step 1: Understand what 2 × 5 means. It means '2 taken 5 times' or '5 groups of 2'.
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Step 2: You can think of it as repeated addition: 2 + 2 + 2 + 2 + 2.
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Step 3: Add the first two 2s: 2 + 2 = 4.
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Step 4: Add the next 2: 4 + 2 = 6.
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Step 5: Add the next 2: 6 + 2 = 8.
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Step 6: Add the last 2: 8 + 2 = 10.
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Answer: So, 2 × 5 = 10.

Why It Matters

Understanding basic multiplication like 2 × 5 is crucial for building a strong foundation in Maths, which is vital for Computing and AI. Engineers use this for calculations, data scientists use it for analyzing information, and even game developers use it for scoring points in games.

Common Mistakes

MISTAKE: Thinking 2 × 5 is the same as 2 + 5 (which is 7) | CORRECTION: 2 × 5 means adding 2, five times, or adding 5, two times, which equals 10. Multiplication is a shortcut for repeated addition.

MISTAKE: Getting confused between the 'times' and 'plus' signs. | CORRECTION: The '×' sign means multiplication, which is different from the '+' sign for addition. Always pay attention to the symbol.

MISTAKE: Counting incorrectly when doing repeated addition. | CORRECTION: Double-check your counting when adding repeatedly. For 2 × 5, make sure you add 2 exactly 5 times, not 4 or 6 times.

Practice Questions

Try It Yourself

QUESTION: If you have 2 plates, and each plate has 5 ladoos, how many ladoos do you have in total? | ANSWER: 10 ladoos

QUESTION: An auto-rickshaw fare is Rs 5 per kilometer. If you travel 2 kilometers, how much will the fare be? | ANSWER: Rs 10

QUESTION: Rina buys 2 packets of biscuits. Each packet has 5 biscuits. She eats 3 biscuits. How many biscuits are left? | ANSWER: First, find total biscuits: 2 × 5 = 10. Then subtract eaten biscuits: 10 - 3 = 7 biscuits left.

MCQ

Quick Quiz

Which of these is another way to write 2 × 5?

2 + 5

5 + 5

2 + 2 + 2 + 2 + 2

Both B and C

The Correct Answer Is:

2 × 5 means adding 2 five times (2 + 2 + 2 + 2 + 2) or adding 5 two times (5 + 5). Both options B and C correctly represent 2 × 5.

Real World Connection

In the Real World

When you buy items at a shop, like 2 packets of chips that cost Rs 5 each, the shopkeeper quickly calculates the total using 2 × 5. Even the UPI payment apps use multiplication in the background to calculate your total bill when you buy multiple items of the same price.

Key Vocabulary

Key Terms

Multiplication: A way to find the total of equal groups | Product: The answer to a multiplication problem | Factor: The numbers you multiply together | Repeated Addition: Adding the same number multiple times

What's Next

What to Learn Next

Great job understanding 2 × 5! Next, you should explore other basic multiplication facts, like 3 × 4 or 5 × 6. This will help you build your multiplication tables and make calculations even faster and easier.