Help math learners review the divisibility rule for 3 with this fun practice worksheet! Geared toward third- and fourth-grade students, this worksheet begins with a review of the rule that states that a number is divisible by 3 if the sum of its digits is divisible by 3. Learners will also be shown an example and a non-example of this divisibility rule. Then, students will be asked to apply the rule to a set of given numbers, ranging from two digits to five digits, circling all the numbers that are divisible by 3. Learning divisibility rules is a great way to help learners build number sense and confidence when working with larger numbers. Next up, check out the Divisibility Rules: Dividing by 4 worksheet!