What is Fifty-Five?

S0-SA1-1038

Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

Fifty-Five is a whole number that comes after fifty-four and before fifty-six. It is written using two digits, '5' and '5', where the first '5' represents fifty (5 tens) and the second '5' represents five (5 ones).

Simple Example

Quick Example

Imagine you have 5 bundles of ten rupees each, and then 5 more loose one-rupee coins. If you count all your money, you will have fifty-five rupees. It's like having 50 rupees and adding 5 more rupees to it.

Worked Example

Step-by-Step

Let's say your cricket team scored 5 runs in the first over and then 50 more runs in the next few overs. How many runs did they score in total?

Step 1: Identify the runs scored in the first over: 5 runs.
---Step 2: Identify the runs scored in the next few overs: 50 runs.
---Step 3: To find the total, we add these two numbers: 5 + 50.
---Step 4: Adding 5 and 50 gives us 55.
---Answer: Your cricket team scored a total of 55 runs.

Why It Matters

Understanding numbers like fifty-five is crucial for daily life and many subjects. It forms the foundation for counting, arithmetic, and even understanding data. Accountants, shopkeepers, and even scientists use numbers like this every day to count things, calculate costs, and measure quantities.

Common Mistakes

MISTAKE: Confusing fifty-five (55) with five-hundred-and-five (505) or five-and-five (5+5=10). | CORRECTION: Remember that fifty-five means 5 tens and 5 ones, written as 55. The position of the digit matters a lot.

MISTAKE: Writing '505' when you mean fifty-five. | CORRECTION: Fifty-five is '55'. '505' has a zero in the tens place, making it five hundred and five, a much larger number.

MISTAKE: Thinking 'fifty-five' means multiplying 5 by 5 (which is 25). | CORRECTION: Fifty-five is a number representing a quantity, not an operation between two fives. It means 50 + 5.

Practice Questions

Try It Yourself

QUESTION: If you have 5 packets of biscuits, and each packet has 10 biscuits, how many biscuits do you have in total? Then, if your friend gives you 5 more biscuits, what is the total number of biscuits? | ANSWER: 55 biscuits

QUESTION: An auto-rickshaw driver completed 5 trips in the morning, earning 10 rupees per trip. In the afternoon, he completed 5 more trips, also earning 10 rupees per trip. How much money did he earn in total? | ANSWER: 100 rupees (5 trips x 10 rupees = 50 rupees in morning; 5 trips x 10 rupees = 50 rupees in afternoon; 50 + 50 = 100 rupees. This question is a trick to ensure students don't automatically jump to 55).

QUESTION: You want to buy a toy car that costs 75 rupees. You have 20 rupees, and your parents give you 35 more rupees. How much more money do you need to buy the toy car? | ANSWER: 20 rupees (20 + 35 = 55 rupees you have. 75 - 55 = 20 rupees needed).

MCQ

Quick Quiz

Which of the following represents the number fifty-five?

5 + 5

50 + 5

5 x 5

500 + 5

The Correct Answer Is:

Fifty-five means 5 tens and 5 ones, which is 50 plus 5. Options A and C are operations, and option D represents five hundred and five.

Real World Connection

In the Real World

When you buy groceries, the shopkeeper might tell you the total bill is 'fifty-five rupees'. When you look at the score in a cricket match, a player might have scored 'fifty-five' runs. Even your mobile phone's battery percentage or the amount of data left might show '55%'.

Key Vocabulary

Key Terms

DIGIT: A single symbol used to write numbers (0, 1, 2, ... 9) | WHOLE NUMBER: A number without fractions or decimals (0, 1, 2, 3, ...) | PLACE VALUE: The value of a digit based on its position in a number | TENS PLACE: The second digit from the right, representing groups of ten | ONES PLACE: The first digit from the right, representing single units

What's Next

What to Learn Next

Now that you understand what fifty-five is, you can explore larger numbers and their place values, like hundreds and thousands. This will help you count bigger amounts and solve more complex problems in maths and daily life!