These 20 task cards have three types of problems. Cards 1-8 ask students to find the missing number on a number line. Cards 9-16 ask students to find the missing number in a list of 5-6 numbers. Cards 17-20 have students finding the number that is missing from a table. These cards make a great math station and are perfect for review for SOL testing. An answer key and student recording sheet are also included.