What is The Number 55?

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Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

The number 55 is a two-digit number. It comes after 54 and before 56. It is made up of five tens and five ones.

Simple Example

Quick Example

Imagine you have 55 rupees in your piggy bank. This means you have enough money to buy a small packet of biscuits for 10 rupees five times, and still have 5 rupees left over, or you could buy a samosa for 15 rupees three times and still have 10 rupees left.

Worked Example

Step-by-Step

Let's find out how many cricket balls you can buy if each ball costs 10 rupees and you have 55 rupees.
1. Total money = 55 rupees
2. Cost of one cricket ball = 10 rupees
3. Divide total money by cost per ball: 55 / 10
4. We know 10 x 5 = 50
5. So, you can buy 5 cricket balls.
6. Money left over = 55 - 50 = 5 rupees.
Answer: You can buy 5 cricket balls and will have 5 rupees left.

Why It Matters

Understanding numbers like 55 is fundamental to all of mathematics. It helps you count, measure, and solve problems in daily life. This skill is crucial for careers like banking, engineering, and even managing a small business.

Common Mistakes

MISTAKE: Reading 55 as 'five five' instead of 'fifty-five'. | CORRECTION: Always read two-digit numbers correctly. The first digit tells you the tens, and the second tells you the ones.

MISTAKE: Thinking 55 is a single-digit number because it's 'five and five'. | CORRECTION: 55 has two digits, 5 and 5, making it a two-digit number. It represents a quantity much larger than just 5.

MISTAKE: Confusing the place value of the digits, for example, thinking the first 5 means 'five ones'. | CORRECTION: In 55, the first 5 is in the tens place (meaning 50), and the second 5 is in the ones place (meaning 5).

Practice Questions

Try It Yourself

QUESTION: If you score 55 marks in a test, and the passing marks are 33, did you pass? | ANSWER: Yes, because 55 is greater than 33.

QUESTION: A bus has 55 seats. If 20 passengers are already on the bus, how many more passengers can sit? | ANSWER: 35 more passengers (55 - 20 = 35).

QUESTION: Your mobile phone has 55% battery left. If you use 10% battery for gaming and then another 5% for watching videos, how much battery is left? | ANSWER: 40% battery left (55% - 10% - 5% = 40%).

MCQ

Quick Quiz

Which of these statements about the number 55 is true?

It is a three-digit number.

It comes after 56.

It is made of five tens and five ones.

It is an odd number and comes before 54.

The Correct Answer Is:

Option C is correct because 55 means 50 + 5, which is five tens and five ones. It is not a three-digit number, it comes before 56, and it comes after 54.

Real World Connection

In the Real World

You see the number 55 everywhere in India! For example, a cricket player's jersey number might be 55, or a bus route number could be 55. Your school might have 55 minutes for a particular class, or a shop might offer a discount of 55 rupees on an item. Even the speed limit on some roads could be 55 km/h.

Key Vocabulary

Key Terms

DIGIT: A symbol used to write numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) | PLACE VALUE: The value of a digit based on its position in a number | TENS PLACE: The position of a digit representing groups of ten | ONES PLACE: The position of a digit representing single units

What's Next

What to Learn Next

Now that you understand the number 55, you can explore other two-digit numbers, and learn about adding and subtracting them. This will help you solve more complex math problems and understand bigger numbers easily.