These 10 unique printable worksheets are designed to help elementary age children learn subtraction facts focusing on numbers 1 through 12. There are 30 problems per worksheet. The goal is to be able to complete all 30 correctly in 1:30 minutes. Some children may need to complete several sheets to reach their goal. Each time, allow the children to complete the sheet and mark down the time. They love to beat their best time, and with practice, they will meet the goal and have a good grasp of subtraction facts for 1 through 12.