Free Printable Halloween Write The Missing Number Worksheet by tinywhiz | Oct 8, 2016 | 1st Grade, Counting, Halloween, Kindergarten, Number Recognition | Download our brand new Halloween printable worksheet and find the missing numbers (20-50). This exercise is great for kindergarten and 1st grade aged groups. Download Here More Math Resources Subscribe To Our NewsletterJoin our mailing list to receive the latest worksheets and blog posts from TinyWhiz. SUBSCRIBE! You have Successfully Subscribed!