What is After (Number)?

S0-SA1-0078

Grade Level:

Pre-School

Maths, Computing

Definition

What is it?

When we ask 'What is after a number?', we are looking for the very next whole number that comes immediately after it when counting. It's like taking one step forward on a number line. This concept helps us understand the order of numbers.

Simple Example

Quick Example

Imagine you have 5 delicious ladoos. If someone asks, 'What is after 5 ladoos?', they mean if you get one more ladoo, how many would you have? The answer is 6 ladoos. So, 6 is after 5.

Worked Example

Step-by-Step

Let's find 'What is after 12?'.

1. Start with the given number: 12.
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2. To find the number immediately after, we add 1 to it.
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3. So, we calculate: 12 + 1.
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4. The sum is 13.
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5. Therefore, 13 is after 12.

Answer: 13

Why It Matters

Understanding 'after' helps us count, sort, and order things correctly, which is fundamental in Maths. In Computing, it's used in sequencing operations and creating loops. Many careers, from a shopkeeper counting change to a software engineer designing game levels, rely on this basic number sense.

Common Mistakes

MISTAKE: Saying a number far away (e.g., 'What is after 5?' - '10') | CORRECTION: Always find the immediate next number by adding just 1.

MISTAKE: Confusing 'after' with 'before' (e.g., 'What is after 7?' - '6') | CORRECTION: 'After' means adding 1, 'before' means subtracting 1.

MISTAKE: Forgetting that 'after' always means a larger number | CORRECTION: The number after will always be exactly one greater than the original number.

Practice Questions

Try It Yourself

QUESTION: What number comes after 9? | ANSWER: 10

QUESTION: My train ticket number is 45. What number is after 45? | ANSWER: 46

QUESTION: If you are on the 99th floor of a building, what floor number is immediately after it? | ANSWER: 100

MCQ

Quick Quiz

Which number comes after 23?

The Correct Answer Is:

To find the number after 23, we add 1 to it, which gives us 24. Options A, C, and D are either before 23 or not immediately after.

Real World Connection

In the Real World

When you are watching a cricket match, the scoreboard shows the current score. If a batsman hits a boundary for 4 runs, the score changes from (e.g.) 120 to 124. But if they just take a single run, the score goes from 120 to 121. That '121' is the number immediately after 120, showing the very next score.

Key Vocabulary

Key Terms

SUCCESSOR: The number that comes immediately after another number. | COUNTING: Listing numbers in order. | NUMBER LINE: A visual representation of numbers in sequence. | WHOLE NUMBER: Numbers without fractions or decimals (0, 1, 2, 3...).

What's Next

What to Learn Next

Great job understanding 'What is After (Number)!'. Now that you know how to find the next number, you can explore 'What is Before (Number)?'. This will help you understand the full sequence of numbers even better.