Lesson 1

Working with Groups

Est. Class Sessions: 2

Teacher Notes

DPP item D provides practice with the using-doubles strategy to solve subtraction.

Possible response: I know 14 − 7 = 7. 13 − 7 is one less, so 13 − 7 = 6.

Ongoing Assessment

Use DPP item D to assess students’ abilities to demonstrate fluency with the subtraction facts related to the addition facts in Group D [E9].

See the Letter Home for targeted practice ideas.

Jerome used doubles to solve 15 − 8. He said, “I know 16 − 8 = 8. 15 − 8 is one less, so 15 − 8 = 7.”

Show or tell how to use Jerome’s strategy to solve 13 − 7.