Last updated on May 26th, 2025
The divisibility rule is a way to find out whether a number is divisible by another number without using the division method. In real life, we can use the divisibility rule for quick math, dividing things evenly, and sorting things. In this topic, we will learn about the divisibility rule of 80.
The divisibility rule for 80 is a method by which we can find out if a number is divisible by 80 or not without using the division method. Check whether 2880 is divisible by 80 with the divisibility rule.
Step 1: Check if the number ends with two zeros or can be divided by 4 and 20. In 2880, the last digit is 0.
Step 2: Divide the last two digits by 4. Here, 80 ÷ 4 = 20.
Step 3: Since 20 is a multiple of 20, the number 2880 is divisible by 80. If the result from step 2 isn't a multiple of 20, then the number isn't divisible by 80.
Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 80.
Memorize the multiples of 80 (80, 160, 240, 320…etc.) to quickly check divisibility. If the result from the division is a multiple of 20, then the number is divisible by 80.
If a number is divisible by both 4 and 20, then it is divisible by 80.
Students should keep repeating the divisibility process until they reach a small number that confirms divisibility by 80. For example: Check if 5760 is divisible by 80 using the divisibility test. Divide the last two digits by 4: 60 ÷ 4 = 15. Since 15 is not a multiple of 20, 5760 is not divisible by 80.
Students can use the division method as a way to verify and cross-check their results. This will help them verify and also learn.
The divisibility rule of 80 helps us quickly check if a given number is divisible by 80, but common mistakes like calculation errors lead to incorrect calculations. Here we will understand some common mistakes that will help you to understand.
Can a shipment of 320 boxes be divided equally among 80 trucks?
Yes, 320 can be divided equally among 80 trucks.
To determine if 320 is divisible by 80, check if it can be divided without a remainder: 320 ÷ 80 = 4.
Since the result is a whole number, 320 is divisible by 80.
Is the number 640 divisible by 80?
Yes, 640 is divisible by 80.
For 640 to be divisible by 80, calculate 640 ÷ 80 = 8.
The result is a whole number, indicating that 640 is divisible by 80.
Can a total of 560 apples be packed into bags containing 80 apples each?
Yes, 560 apples can be packed into bags containing 80 apples each.
Check if 560 is divisible by 80: 560 ÷ 80 = 7.
The result is a whole number, so 560 is divisible by 80.
Is the number 150 divisible by 80?
No, 150 is not divisible by 80.
To check if 150 is divisible by 80, calculate 150 ÷ 80 = 1.875.
Since the result is not a whole number, 150 is not divisible by 80.
Can 800 pages be divided equally among 80 chapters?
Yes, 800 pages can be divided equally among 80 chapters.
Determine if 800 is divisible by 80 by calculating 800 ÷ 80 = 10.
The result is a whole number, so 800 is divisible by 80.
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
: She loves to read number jokes and games.