What is 2 × 7?

S1-SA1-0663

Grade Level:

Class 2

Maths, Computing, AI

Definition

What is it?

2 × 7 means adding the number 2, seven times. It is a basic multiplication problem that helps us find the total when we have equal groups. This concept is fundamental to understanding how numbers combine quickly.

Simple Example

Quick Example

Imagine you have 2 ladoos on each of 7 plates. To find the total number of ladoos, you can count them all, or you can use multiplication. 2 × 7 will quickly tell you how many ladoos you have in total.

Worked Example

Step-by-Step

Let's calculate 2 × 7:
1. Multiplication means repeated addition. So, 2 × 7 means adding the number 2, seven times.
2. Write it out: 2 + 2 + 2 + 2 + 2 + 2 + 2
3. Start adding: 2 + 2 = 4
4. Continue: 4 + 2 = 6
5. Next: 6 + 2 = 8
6. Keep going: 8 + 2 = 10
7. Almost there: 10 + 2 = 12
8. Finally: 12 + 2 = 14
So, 2 × 7 = 14.

Why It Matters

Understanding simple multiplication like 2 × 7 is crucial for computing and AI, as computers constantly perform millions of such calculations. It's used by engineers designing new tech, data analysts making sense of information, and even game developers to create virtual worlds.

Common Mistakes

MISTAKE: Adding 2 and 7 to get 9. | CORRECTION: Remember that '×' means multiplication, which is repeated addition, not just simple addition.

MISTAKE: Multiplying 2 by itself 7 times (2^7). | CORRECTION: 2 × 7 means adding 2, seven times. It does not mean 2 multiplied by itself seven times.

MISTAKE: Forgetting the multiplication table for 2. | CORRECTION: Practice the multiplication table for 2 regularly. Knowing it by heart makes these calculations much faster.

Practice Questions

Try It Yourself

QUESTION: If you have 2 friends and each friend gives you 5 toffees, how many toffees do you have in total? (Hint: This is 2 × 5) | ANSWER: 10 toffees

QUESTION: An auto-rickshaw charges ₹2 for every kilometer. If you travel 8 kilometers, how much will you pay? | ANSWER: ₹16

QUESTION: You are buying 7 pens, and each pen costs ₹2. You give the shopkeeper a ₹20 note. How much change will you get back? | ANSWER: ₹6 change (Cost of pens = 2 × 7 = 14. Change = 20 - 14 = 6)

MCQ

Quick Quiz

What is the result of 2 multiplied by 7?

The Correct Answer Is:

2 multiplied by 7 means adding 2 seven times (2 + 2 + 2 + 2 + 2 + 2 + 2), which equals 14. Options A, B, and D are incorrect results for this multiplication.

Real World Connection

In the Real World

From calculating the total cost of 7 samosas at ₹2 each at a local chai stall, to figuring out how many total runs a cricket team scored if 7 batsmen each scored 2 runs, simple multiplication is used daily. Even delivery apps like Swiggy or Zomato use these calculations to estimate total order costs.

Key Vocabulary

Key Terms

Multiplication: A quick way to do repeated addition | Product: The answer you get when you multiply numbers | Factor: A number that is multiplied by another number | Repeated Addition: Adding the same number multiple times

What's Next

What to Learn Next

Great job understanding 2 × 7! Next, you can explore other basic multiplication facts, like 3 × 5 or 4 × 6. These build on what you've learned and will make you even faster at calculations.