Eureka math grade 5 module 6 lesson 18 problem set July 8, 2019 16 32 64 128 Eureka math grade 5 module 6 lesson 1 Eureka math grade 5 module 5 lesson 6 Eureka math grade 5 module 6 lesson 19 homework Eureka math grade 5 module 2 lesson 18 problem set Eureka math grade 5 module 5 lesson 18