What is Less Than?

S0-SA1-0066

Grade Level:

Class 1

Maths, Logic, Computing, AI

Definition

What is it?

When we say 'less than', it means one number or quantity is smaller in value compared to another. It helps us compare two things and decide which one has a smaller amount or count.

Simple Example

Quick Example

Imagine you have 5 ladoos and your friend has 3 ladoos. Since 3 is a smaller number than 5, we say your friend has less than you. So, 3 ladoos is less than 5 ladoos.

Worked Example

Step-by-Step

Let's find out if 15 is less than 20.
---Step 1: Look at the two numbers we need to compare: 15 and 20.
---Step 2: Think about counting. If we count from 1, which number comes first? 15 comes before 20.
---Step 3: When a number comes before another number on the number line, it means it is smaller, or 'less than'.
---Step 4: So, 15 is indeed less than 20.
Answer: Yes, 15 is less than 20.

Why It Matters

Understanding 'less than' is super important for problem-solving in Maths and even in computing! It's used in coding to make decisions, like checking if a customer's age is less than 18. Data analysts use it to compare sales figures, and engineers use it to ensure measurements are less than a certain limit for safety.

Common Mistakes

MISTAKE: Confusing 'less than' with 'greater than'. For example, thinking 8 is less than 5. | CORRECTION: Always remember 'less than' means smaller. 8 is bigger than 5, so 8 is NOT less than 5.

MISTAKE: Only comparing single-digit numbers and getting confused with multi-digit numbers. For example, thinking 12 is less than 9. | CORRECTION: Always compare the place values (tens, ones, etc.). 12 has one ten and two ones, while 9 only has nine ones. So 9 is less than 12.

MISTAKE: Not understanding the symbol for 'less than' (<). For example, writing 7 > 10 to mean 7 is less than 10. | CORRECTION: The 'less than' symbol points to the smaller number. So, it should be written as 7 < 10.

Practice Questions

Try It Yourself

QUESTION: Is 7 less than 11? | ANSWER: Yes

QUESTION: You have 25 rupees. Your friend has 18 rupees. Who has less money? | ANSWER: Your friend has less money (18 rupees is less than 25 rupees).

QUESTION: Arrange these numbers from least to greatest: 34, 19, 50, 28. | ANSWER: 19, 28, 34, 50

MCQ

Quick Quiz

Which of these statements is true?

15 is less than 10

20 is less than 20

50 is less than 45

30 is less than 35

The Correct Answer Is:

Option D is correct because 30 comes before 35 when counting, meaning 30 is smaller in value. Options A, B, and C are false because 15 is greater than 10, 20 is equal to 20, and 50 is greater than 45.

Real World Connection

In the Real World

When you buy groceries, the billing machine compares the price of each item to your budget to see if the total is less than what you can spend. In a cricket match, the target score for the chasing team needs to be less than the opponent's score to win. Online shopping apps often show you products that cost less than a certain amount you filter for.

Key Vocabulary

Key Terms

COMPARE: To check how two or more things are similar or different in value or size | SMALLER: Having less size or value | VALUE: The numerical amount or worth of something | QUANTITY: The amount or number of something | NUMBER LINE: A straight line with numbers placed at equal intervals along its length.

What's Next

What to Learn Next

Great job understanding 'less than'! Next, you should explore 'Greater Than' and 'Equal To'. These concepts complete your understanding of comparing numbers and are essential building blocks for all of mathematics.