Supplemental triple-digit addition and subtraction for kids grades 2-3. Do you need extra math practice worksheets for triple digit addition and subtraction? Our workbook contains over 1000 math equations based on triple digit addition and subtraction for kids ages 7-9. Organized into daily practice sets of 15 equations with space to record a daily score. Supplemental math practice workbooks are an excellent complement to standard school materials. The extra practice can help you child develop math skills and confidence. Our equations are organized in small sets of 15 per page with a border that can also be colored in for extra fun. This book also contains 20 missing digit worksheets at the end for an extra challenge. Contents: 25 addition and 25 subtraction worksheets - Answers included - 8.5x11 inch trim size - Matte paperback cover - 20 challenging missing digit worksheets Suitable for kids ages 7-9.