What is Seventy-Eight?

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Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

Seventy-Eight is a number that comes after seventy-seven and before seventy-nine. It is an even number, which means it can be divided by 2 without any remainder. We write it using two digits: 7 and 8.

Simple Example

Quick Example

Imagine you have 78 cricket balls in a big basket. If you give 1 ball to your friend, you will have 77 balls left. If you get 1 more ball, you will have 79 balls. Seventy-eight is right in the middle!

Worked Example

Step-by-Step

Let's count up to seventy-eight:
1. Start counting from 1.
2. Keep counting: 1, 2, 3, ...
3. When you reach 70, continue: 71, 72, 73, 74, 75, 76, 77.
4. The very next number after 77 is 78.
--- You can also think of it as seven tens and eight ones.
--- If you have 7 bundles of 10 pencils each, and then 8 loose pencils, you have 70 + 8 = 78 pencils in total.
Answer: Seventy-eight is the number 78.

Why It Matters

Understanding numbers like seventy-eight is the foundation for all maths, from simple counting to complex calculations. It's crucial for careers like being an accountant managing finances, an engineer designing structures, or even a shopkeeper counting change correctly.

Common Mistakes

MISTAKE: Confusing seventy-eight (78) with eighty-seven (87) | CORRECTION: Remember that 'seventy' means 7 tens, and 'eighty' means 8 tens. The first digit tells you how many tens there are.

MISTAKE: Writing '708' for seventy-eight | CORRECTION: '708' is seven hundred eight. Seventy-eight is a two-digit number, 78, where the 7 is in the tens place and the 8 is in the ones place.

MISTAKE: Thinking seventy-eight is an odd number | CORRECTION: An even number always ends with 0, 2, 4, 6, or 8. Since 78 ends with an 8, it is an even number.

Practice Questions

Try It Yourself

QUESTION: What number comes just before seventy-eight? | ANSWER: Seventy-seven (77)

QUESTION: If you have 7 tens and 8 ones, what number do you have? | ANSWER: Seventy-eight (78)

QUESTION: Your school bus has 78 seats. If 30 students are already sitting, how many more students can sit? | ANSWER: 48 students (78 - 30 = 48)

MCQ

Quick Quiz

Which of these represents the number seventy-eight?

70 + 8

7 + 8

80 - 7

70 + 08

The Correct Answer Is:

Option A, 70 + 8, correctly adds up to 78. Option B is 15. Option C is 73. Option D is the same as A, but option A is the standard way of writing it.

Real World Connection

In the Real World

When you look at a cricket scoreboard during an IPL match, you might see a player's score as 78 runs. Or, if you are checking the temperature in Celsius in a very hot Indian city, it will be a number, but usually much less than 78 degrees!

Key Vocabulary

Key Terms

DIGIT: A single symbol used to write numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) | EVEN NUMBER: A number that can be divided by 2 exactly, with no remainder | PLACE VALUE: The value of a digit based on its position in a number (e.g., in 78, the 7 is in the tens place) | TENS PLACE: The second digit from the right in a whole number, representing groups of ten

What's Next

What to Learn Next

Now that you understand seventy-eight, you can move on to learning about larger numbers like hundreds and thousands. This will help you count bigger quantities and understand more complex calculations in daily life.