What is Four Hundred?

S0-SA1-1097

Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

Four Hundred is a number that comes after 399 and before 401. It represents four groups of one hundred, or 40 tens, or 400 ones. It is written as 400.

Simple Example

Quick Example

Imagine you have 4 notes of 100 rupees each. If you count all the money together, you have Four Hundred rupees. This is enough to buy a nice cricket bat or a few packets of your favourite biscuits!

Worked Example

Step-by-Step

Let's see how we get to Four Hundred:
1. Start with the number 399.
---2. We want to find the next number after 399.
---3. To find the next number, we add 1 to 399.
---4. 399 + 1 = 400.
---5. So, Four Hundred is the number you get when you add 1 to 399.
Answer: 400

Why It Matters

Understanding numbers like Four Hundred is super important for everyday life and bigger math. It helps you count money, measure things, and even understand scores in games. Engineers use it to count parts, and shopkeepers use it to manage inventory.

Common Mistakes

MISTAKE: Writing 'Four Hundred' as 4000 | CORRECTION: Remember 'hundred' has two zeros. Four Hundred is 4 followed by two zeros, making it 400.

MISTAKE: Thinking 'Four Hundred' is the same as 'Forty' | CORRECTION: Forty is 40 (four tens). Four Hundred is 400 (four hundreds). They are very different amounts!

MISTAKE: Confusing 'Four Hundred' with 'Fourty' | CORRECTION: The correct spelling is F-O-U-R H-U-N-D-R-E-D. 'Fourty' is a common misspelling of 'Forty'.

Practice Questions

Try It Yourself

QUESTION: What number comes just before Four Hundred? | ANSWER: 399

QUESTION: If you have two 100-rupee notes and two 50-rupee notes, how much money do you have? | ANSWER: 2 x 100 + 2 x 50 = 200 + 100 = 300 rupees. (This is not Four Hundred, it's 300!)

QUESTION: A school has 350 students. If 50 more students join, how many students will the school have in total? | ANSWER: 350 + 50 = 400 students

MCQ

Quick Quiz

Which of these represents Four Hundred?

400

4000

The Correct Answer Is:

Four Hundred means 4 followed by two zeros, which is 400. 40 is forty, 4000 is four thousand, and 4 is just four.

Real World Connection

In the Real World

When you check your mobile data balance, you might see '400 MB remaining'. This means you have four hundred megabytes of data left. Or if a cricket team scores 399 runs, the next run will take them to a total of 400 runs!

Key Vocabulary

Key Terms

NUMBER: A count or measure | HUNDRED: Ten tens, or 100 units | DIGIT: A single symbol used to write numbers (0-9) | PLACE VALUE: The value of a digit based on its position in a number

What's Next

What to Learn Next

Great job understanding Four Hundred! Next, you can explore 'What is Five Hundred?' This will help you count even bigger numbers and understand how numbers increase in groups of hundreds. Keep up the good work!