The primary purpose of this worksheet is for students to practice finding complements of ten. Understanding basic complements of ten will allow students to build upon and extend this knowledge to other mathematical concepts, including fact extensions (30 + 70 = 100), and higher complements to reach multiples of ten. (64 + 6 = 70, or 80-42= 38). Mastering these basic "ten partners" will also further develop our young students' mental math skills! Have fun! Please visit my product listing about