Lesson 13 practice problems unit 3 July 8, 2019 16 32 64 128 Unit 3 lesson 13 cumulative practice problems Unit 3 lesson 13 practice problems answer key Unit 3 lesson 13 practice problems answer key grade 8 Unit 3 lesson 13 practice problems answer key 6th grade Unit 3 lesson 13 practice problems answer key geometry Grade 6 unit 3 lesson 13 practice problems