Unit 5: Arithmetic in base ten

Lesson 1: Using decimals in a shopping context
Lesson 2: Using diagrams to represent addition and subtraction
Lesson 4: Adding and subtracting decimals with many non-zero digits
Lesson 6: Methods for multiplying decimals
Lesson 8: Calculating products of decimals
Lesson 10: Using long division
Lesson 11: Dividing numbers that result in decimals
Lesson 12: Dividing decimals by whole numbers
Lesson 13: Dividing decimals by decimals