Numbers 21 to 50
After learning numbers up to 20, we move ahead to 21 to 50. All these are two-digit numbers.
Each number has a tens digit and a ones digit. The tens digit changes at every group of 10: 20s, 30s, 40s.
What is Numbers 21 to 50 - Class 1 Maths (Numbers up to 100)?
Numbers 21 to 50 are two-digit numbers with tens values from 2 to 5.
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
Solved Examples
Example 1: Tens and Ones in 35
Question: How many tens and ones in 35?
Think:
- Tens digit = 3 → 3 tens
- Ones digit = 5 → 5 ones
Answer: 35 = 3 tens and 5 ones.
Example 2: What Comes After 29?
Question: What number comes after 29?
Think:
- 29 + 1 = 30
- After the 20s, we enter the 30s
Answer: 30 comes after 29.
Example 3: Count from 40 to 50
Question: Count forward from 40 to 50.
Think:
- Start at 40 and add 1 each time
40 — 41 — 42 — 43 — 44 — 45 — 46 — 47 — 48 — 49 — 50
Answer: The numbers from 40 to 50 are listed above.
Example 4: Between 24 and 26
Question: What number is between 24 and 26?
Think:
- 24, ?, 26
- 24 + 1 = 25
Answer: 25 is between 24 and 26.
Example 5: Ria's Book Pages
Question: Ria's storybook has 48 pages. How many tens and ones is that?
Think:
- 48 → tens digit = 4, ones digit = 8
- 4 tens and 8 ones
Answer: 48 = 4 tens and 8 ones.
Example 6: Number Before 40
Question: What number comes just before 40?
Think:
- 40 − 1 = 39
Answer: 39 comes just before 40.
Example 7: Fill the Missing Numbers
Question: 31, 32, ___, 34, ___, 36.
Think:
- After 32 → 33
- After 34 → 35
Answer: 31, 32, 33, 34, 35, 36.
Key Points to Remember
- Numbers 21 to 50 are all two-digit numbers.
- The tens digit tells us which group of ten we are in (2 = twenties, 3 = thirties, 4 = forties).
- After 29 comes 30, after 39 comes 40, after 49 comes 50.
- 50 = 5 tens + 0 ones. It is halfway to 100.
- To break a number into tens and ones, read the left digit for tens and the right digit for ones.
Practice Problems
- Count from 25 to 35. Write all the numbers.
- How many tens and ones in 42?
- What number comes after 39?
- What number comes before 50?
- Fill in: 27, 28, ___, ___, 31.
- Kavi has 37 marbles. How many tens and ones is that?
Frequently Asked Questions
Q1. What are the numbers from 21 to 50?
They are 30 two-digit numbers starting from 21 and ending at 50. They include the twenties (21-29), thirties (30-39), forties (40-49), and 50.
Q2. How many tens are in 45?
45 has 4 tens and 5 ones. The tens digit is 4.
Q3. What comes after 49?
50 comes after 49. The ones digit goes back to 0, and the tens digit increases by 1.
Q4. How do I read the number 38?
38 is read as Thirty-eight. It has 3 tens (thirty) and 8 ones (eight).
Q5. Is 50 the same as 5 tens?
Yes. 50 = 5 tens + 0 ones, which equals 50.
Q6. How do I count from 29 to 31?
29, 30, 31. When the ones digit reaches 9, the next number has 0 ones and one more ten.
