Lesson 2

100 Links

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

Spin for 50 was introduced in Unit 10 Lesson 4. Students used skip counting by tens (groups of tens and leftovers) to determine the number of Xs on their game boards. In Lesson 2 of Unit 11, students skip count by tens to find the number of links in a 100-link chain.

  1. Ana had 30 Xs.
    Nila had 40 Xs.
  2. 10 Xs. Possible response: Nila
    had one more full ten frame.
  3. Ana needs 20 Xs.
    Nila needs 10 Xs.

D. Spin for 50

Use your ten frames to help you.

Ana and Nila played Spin for 50. During the game, Ana had 3 full ten frames. Nila had 4 full ten frames.

  1. How many Xs did each girl have?

  2. How many more Xs did Nila have? Explain how you know.

  3. How many more Xs does each girl need to reach 50?