Number Line (Grade 1)
A number line is a straight line with numbers placed at equal spaces along it. It shows numbers in order from small to big (left to right).
In Class 1, children use number lines to understand the order of numbers, add, subtract, find 'one more,' find 'one less,' and compare numbers.
What is Number Line (Grade 1) - Class 1 Maths (Numbers up to 100)?
A number line is a line with numbers marked at equal intervals. Numbers get bigger as you move right and smaller as you move left.
0 — 1 — 2 — 3 — 4 — 5 — 6 — 7 — 8 — 9 — 10
Rules:
- Move right to add (numbers get bigger)
- Move left to subtract (numbers get smaller)
- Numbers are placed at equal distances
Solved Examples
Example 1: Example 1: Read a Number Line
Question: Point to 7 on this number line:
0 — 1 — 2 — 3 — 4 — 5 — 6 — 7 — 8 — 9 — 10
Answer: 7 is the 8th mark from 0.
Example 2: Example 2: One More on Number Line
Question: Start at 4. Move 1 step right. Where are you?
Answer: At 5 (one more than 4).
Example 3: Example 3: One Less on Number Line
Question: Start at 6. Move 1 step left. Where are you?
Answer: At 5 (one less than 6).
Example 4: Example 4: Add on Number Line
Question: Use the number line to find 3 + 4.
Think:
- Start at 3
- Jump 4 steps right: 4, 5, 6, 7
Answer: 3 + 4 = 7.
Example 5: Example 5: Subtract on Number Line
Question: Use the number line to find 8 − 3.
Think:
- Start at 8
- Jump 3 steps left: 7, 6, 5
Answer: 8 − 3 = 5.
Example 6: Example 6: Compare Numbers
Question: On a number line, which is bigger — 3 or 7?
Think:
- 7 is to the right of 3
- Numbers on the right are bigger
Answer: 7 is bigger than 3.
Example 7: Example 7: Between Numbers
Question: What number is between 5 and 7 on a number line?
Answer: 6 is between 5 and 7.
Key Points to Remember
- A number line shows numbers in order from left (small) to right (big).
- Move right to add and left to subtract.
- Numbers on the right are bigger, numbers on the left are smaller.
- A number line helps with counting, comparing, adding, and subtracting.
- The distance between numbers is always equal.
Practice Problems
- Draw a number line from 0 to 10. Circle the number 4.
- Use a number line to find 5 + 3.
- Use a number line to find 9 − 2.
- Which is greater: 2 or 8? Use a number line to check.
- What number is between 11 and 13?
- Start at 6 on a number line. Jump 4 steps right. Where do you land?
Frequently Asked Questions
Q1. What is a number line?
A number line is a straight line with numbers placed at equal distances. Numbers get bigger as you go right and smaller as you go left.
Q2. How do I add on a number line?
Start at the first number. Jump to the right as many times as the second number. Where you land is the answer.
Q3. How do I subtract on a number line?
Start at the first number. Jump to the left as many times as the number being subtracted. Where you land is the answer.
Q4. Does a number line have an end?
A number line goes on forever in both directions. In Class 1, we usually show numbers from 0 to 20 or 0 to 100.
Q5. How do I compare numbers using a number line?
The number that is further to the right is bigger. The number that is further to the left is smaller.
Q6. What is the smallest number on a number line?
In Class 1, the smallest number we use is 0. Zero is at the very left of the number line.
