What Are Divisibility Rules?
Divisibility rules are like math magic tricks!
They help you quickly figure out if one number can be divided by another without leaving a remainder. These shortcuts make division problems much easier!
The Most Useful Divisibility Rules
Rule for 2
A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8).
Example: 346 is divisible by 2 because it ends with 6.
Rule for 3
A number is divisible by 3 if the sum of its digits is divisible by 3.
Example: 123 (1+2+3=6) is divisible by 3 because 6 is divisible by 3.
Rule for 5
A number is divisible by 5 if it ends with 0 or 5.
Example: 450 is divisible by 5 because it ends with 0.
Let's Practice Together!
Example 1: Check Divisibility by 3
Enter any number to see if it's divisible by 3:
Example 2: Check Divisibility by 5
Enter any number to see if it's divisible by 5:
Parent Tips 🌟
- Make it a game: Challenge your child to find numbers around the house (like on clocks, price tags, or license plates) and apply the divisibility rules.
- Use real-world examples: Show how divisibility rules help when dividing treats equally among friends or calculating sports scores.
- Create a cheat sheet: Help your child make colorful flashcards with the different rules to practice with.