WA.5.2. Core Content: Addition and subtraction of fractions and decimals (Numbers, Operations, Algebra) Students extend their knowledge about adding and subtracting whole numbers to learning procedures for adding and subtracting fractions and decimals. Students apply these procedures, along with mental math and estimation, to solve a wide range of problems that involve more of the types of numbers students see in other school subjects and in their lives.
5.2.B. Represent addition and subtraction of decimals using place value models and connect the representation to the related equation.
5.2.F. Fluently and accurately add and subtract decimals.