Unit 5, Lesson 2# Using Diagrams to Represent Addition and Subtraction

Open Up Resources 55 min(s)Support for English Language Learners

Understand that we can compose 10 like base-ten units as a base-ten unit of higher value (e.g., 10 tenths is 1 one) when adding decimals. Understand that adding and subtracting decimals requires combining digits that represent like base-ten units. Add and subtract decimals by writing the calculations vertically with digits in the same places aligned. Let's represent addition and subtraction of decimals.