Class 12 social unit 7 lesson 6 exercise July 8, 2019 16 32 64 128 Class 12 social unit 6 lesson 7 exercise pdf Lesson 12 homework module 5 grade 2 Unit 7 class 6 Lesson 12 homework 1.2 Lesson 12 homework 1.4 Lesson 12 homework 5.2