How to Check for Divisibility by 4

Sheena Doria

This educational video provides a clear, step-by-step guide to understanding and applying the divisibility rule for the number 4. It begins by establishing the fundamental concept of divisibility—explaining that a number is divisible by another if the result is a whole number with no remainder—using visual bar models and long division comparisons between the numbers 16 and 17. The core of the lesson introduces the specific shortcut for the number 4: checking if the last two digits of a number are divisible by 4 or if they are both zeros. The video demonstrates this rule with increasingly complex numbers, ranging from 348 to 95,100, effectively showing how this mental math strategy works for both small and large figures. Non-examples (like 114) are also analyzed to show what happens when the rule is not met. For educators, this video serves as an excellent tool for bridging the gap between concrete understanding of division and abstract mental math strategies. The use of visual aids, such as highlighting the last two digits and using check/cross marks, makes the concept accessible for visual learners. It is particularly useful for introducing the topic of divisibility rules or reviewing division concepts before moving on to factoring and simplifying fractions.