What a fun and engaging way for the students to think about all of the facts that make 40. This sheet has mostly number sentences (addition and subtraction) that equal 40, with a few distractors that they will X out. Most of the facts are up to 40, addition and subtraction,, with a few more challenging number sentences at the end. There are repeats as well to help promote automaticy in recalling facts. Fun, cute, engaging, and great for number sense and to challenge the students. This would be a great practice sheet, homework, center activity or assessment. Learning basic facts is a crucial building block for other 2nd grade math skills, and especially for multiplication in 3rd grade. The more practice, the better! Also check out my Ways to Make 10, 12, 15, 18, 20, 25 and 30!--All of those have accompanying sorting centers too! I plan to work on Ways to Make 45, 50, 55, etc. for my own students, so I will post for sale as well! Let me know if there are any others I can create for you! Thanks!