Lesson 1

Combining and Partitioning

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X
  1. 7; 2 + 5 = 7
  2. 2; 3 + 2 = 5

Ask students to explain their strategies for finding their answers, especially for Question 2.

B. More Part-Whole Diagrams

Tell your neighbor a story for each problem. Then fill in the diagram and a number sentence for each. Use cubes, a number line, or ten frame.