Lesson 2

Goldilocks and the Three Rectangles

Est. Class Sessions: 1–2

Daily Practice and Problems

Teacher Notes
X

Place 15 beans or counters in the bag. Remove 5 beans. Ask students how many are left. An appropriate number sentence for this example is 15 − 5 = 10. Students were introduced to this activity in Unit 6.

D. How Many in the Bag

I have ______ beans in the bag. Now I am taking out ______ beans. How many beans are left in the bag?

Write a number sentence that describes my bag now.