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5.NBT.7 – Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
Samples: Adding Decimals. Subtracting Decimals. Multiplying Decimals By A Single Digit Number. Dividing Whole Numbers by 10.
You can go to an overview of all the curricula here.
7.NA.2 – Apply additive strategies to decimals
Samples: Introduction to decimals: Activity 1. Equivalence between fractions and decimals: Activity 1.