H. Adding Trains 
Use two trains of cubes to solve the problems below. Write a number sentence to describe the combined train.
- 5 and 2
- 3 plus 4
- 8 and 3 more
- 4 and 4
- 5 plus 7
Lesson 3
Parts and Wholes
Est. Class Sessions: 2–3Daily Practice and Problems
Teacher Notes
X
Draw a two partition part-whole diagram on the board. Have students write a number sentence for a problem on the board and then complete the part-whole diagram that matches the number sentence. See the answer to Question A for an example.
- A.
- B.
- 7 = 3 + 4
- C.
- 11 = 3 + 8
- D.
- 4 + 4 = 8
- E.
- 5 + 7 = 12