Here's a fun Missing Number Quiz for preschool to 3rd grade students! The quiz will have the students fill in the missing numbers while counting by 1's and 2's from 1 to 20. Skip Counting by 1's (1-20)Fill in the missing numbers: 1, __, 3, __, 5, __, 7, __, 9, __, 11, __, 13, __, 15, __, 17, __, 19, __ Skip Counting by 2's (1-20)Fill in the missing numbers: __ , 4, __ , 8, __ , 12, __ , 16, __ , 20 Answer Key:Skip Counting by 1's (1-20)1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,