This book contains practice worksheets for addition. It starts with the smallest sums a child can do (1 + 1, 1 + 2, 2 + 3, ...) and works up in size and difficulty until the last pages are four-digit column sums. The skills are in the order they are usually taught: single-digit sums first, then two-digit sums that do not need carrying, then sums that do, and then mixed sums where the child has to work out whether a column needs carrying. Every level comes with five worksheets, one for each day of the school week. Chapters: 1-5 By 1-3 1-5 By 1-5 1-9 By 1-5 1-9 By 1-9 2 Digit By 1 Digit Addition Without Regrouping 2 Digit By 1 Digit Addition With Regrouping 2 Digit By 1 Digit Addition With & Without Regrouping 2 Digit By 2 Digit Addition Without Regrouping 2 Digit By 2 Digit Addition With Regrouping 2 Digit By 2 Digit Addition With & Without Regrouping 3 Digit By 2 Digit Addition With & Without Regrouping 3 Digit By 3 Digit Addition With & Without Regrouping 4 Digit By 3 Digit Addition With & Without Regrouping 4 Digit By 4 Digit Addition With & Without Regrouping