In first grade, students focus on ... Using objects and drawings, solve numeral and word problems that involve adding or subtracting numbers through 20. ... (by shape, color, size, etc.).

Teaching in Room 9. Add/Subtract with Regrouping 3 | 2nd Grade Math. Special | 28m 38s Video has Closed Captions | CC. Addition and subtraction with regrouping using different strategies to solve.

Teaching in Room 9. Add/Subtract With Regrouping 4 | 2nd Grade Math. Special | 29m 6s Video has Closed Captions | CC. Addition & subtraction with regrouping using different strategies to solve.