Divisibility Rule of 669

The divisibility rule for 669 is a method by which we can determine if a number is divisible by 669 without using the division method. Check whether 1338 is divisible by 669 with the divisibility rule.

Step 1: Divide the number into groups of three digits from right to left. Here in 1338, we have 1 and 338.

Step 2: Subtract the second group from the first group. i.e., 1 - 338 = -337.

Step 3: If the result is a multiple of 669, or zero, then the number is divisible by 669. In our case, -337 is not a multiple of 669, so 1338 is not divisible by 669.

Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 669.

• Know the multiples of 669: Memorize the multiples of 669 (669, 1338, 2007, etc.) to quickly check divisibility. If the result from the subtraction is a multiple of 669, then the number is divisible by 669.

• Use the absolute value: If the result we get after subtraction is negative, we will use the absolute value for checking the divisibility of a number.

• Repeat the process for large numbers: Students should keep repeating the divisibility process until they reach a small number that is divisible by 669.
  
  For example: Check if 2676 is divisible by 669 using the divisibility test.
  
  Divide 2676 into groups: 2 and 676.
  
  Subtract the groups: 2 - 676 = -674.
  
  Since -674 isn't a multiple of 669, 2676 isn't divisible by 669.

• Use the division method to verify: Students can use the division method as a way to verify and cross-check their results. This will help them to verify and also learn.

• Divisibility rule: The set of rules used to find out whether a number is divisible by another number or not.

• Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 669 are 669, 1338, 2007, etc.

• Integers: Integers are numbers that include all the whole numbers, negative numbers, and zero.

• Subtraction: Subtraction is the process of finding out the difference between two numbers by reducing one number from another.

• Absolute value: The absolute value of a number is its distance from zero on the number line, without considering its direction. For example, the absolute value of -337 is 337.