Select to bring a copy to your device 1. Tap and to build the two-digit numbers (stack them one on top of the other) 2. Use the and regroup if you find there are units that make up a new group of 10. 3. Solve for the total 2. Check for quality and accuracy. Make changes as needed 3. Tap to explain how you solved the problem. Tap DONE (top right) and move to next page and repeat. 4. Tap to add to your journal or to post to journal and come back to finish later.
CCSS.MATH.CONTENT.2.OA.A.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.1.