Skip Counting Countdown by 2's, 3's, and 5's l Math Worksheets Students will learn and practice number patterns at Halloween theme They fill in the missing numbers by Skip counting by 2’s, 3's, and 5's, Students count by 2's, 3's and 5 within 100' Students count forward and backward from a given number by 2's, 3's, and 5's. students can practice skip counting at this hands-on Great beginning of school activity. Please follow me.