The image shows a math worksheet titled
"Prime Numbers 1–100". The task is to
identify and color the prime numbers in the grid from 1 to 100.
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🔍 What is a Prime Number?
A
prime number is a natural number greater than 1 that has exactly two distinct positive divisors:
1 and itself.
>
✔ Examples: 2, 3, 5, 7, 11, 13, ...
>
✘ Not prime: 4 (divisible by 1, 2, 4), 6 (divisible by 1, 2, 3, 6), etc.
> ⚠️ Note: 0 and 1 are
not considered prime numbers.
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✔ Step-by-step Solution:
We need to go through each number from 1 to 100 and determine if it's prime.
Let’s list all
prime numbers between 1 and 100:
####
✔ Prime Numbers from 1 to 100:
```
2, 3, 5, 7,
11, 13, 17, 19,
23, 29,
31, 37,
41, 43, 47,
53, 59,
61, 67,
71, 73, 79,
83, 89,
97
```
> 🔢 Total:
25 prime numbers
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🧩 How to Use the Worksheet:
1. Look at the 10×10 grid of numbers from 1 to 100.
2. Find each of the above prime numbers.
3.
Color them in (as instructed).
4. Leave composite numbers (non-prime) uncolored.
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💡 Tips for Identifying Primes:
-
Even numbers > 2 are not prime (except 2).
- Check divisibility by small primes (2, 3, 5, 7).
- If a number is divisible by any number other than 1 and itself →
not prime.
- For example:
- 9 = 3×3 → not prime
- 15 = 3×5 → not prime
- 97 → only divisible by 1 and 97 →
prime
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✔ Final Answer:
The prime numbers from 1 to 100 are:
>
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
👉 These are the numbers you should
color in on the chart.
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Would you like me to generate a visual version or help you check specific numbers?
Parent Tip: Review the logic above to help your child master the concept of prime numbers chart 1 100.
