Lesson 4

Zoo Sticker Arrays

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X
  1. 7 stickers; Possible number sentence: 6 +   = 13 and 6 + 7 = 13
  2. 8 stamps: Possible number sentences: 15 − 7 = 8; 7 + 8 = 15
  3. 9 stickers; Possible response: I know 20 − 10 = 20 and 19 is one less, so 19 − 10 = 9.

Ongoing Assessment

Use DPP item L to assess students' abilities to determine the unknown number in an addition or subtraction sentence relating three whole numbers for the facts in Group D [E10].

See the Letter Home for targeted practice ideas.

L. Word Problems

  1. Lee Yah has six animal stickers in her collection. She wants 13. How many more does she need?



    Number sentence _______________________________
  2. John has 15 stamps. He used seven for party invitations. How many does he have left?



    Number sentence _______________________________
  3. Irma has 19 stickers and Nila has 10. How many more does Irma have? Show or tell how you know.