This set of morning work problems focus on 1st Grade Addition and Subtraction for numbers 20 to 100, and is divided into four parts. The first part introduces number sense and place value for numbers to 40, with practice questions for counting, place value, comparing numbers, order and pattern. In the second part, students work on basic addition and subtraction for numbers to 40, first without regroup, then with regroup. Additional exercises are included to extend the concepts to adding three nu