Add, subtract, multiply, and divide decimals to the hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; related the strategy to a written method and explain the reasoning used. (5.NBT.B.7)
Here is an example of the Jumping Strategy. This is a nice strategy for students to be able to show a model for adding decimals using a number line. Once they get comfortable with it, this strategy can go pretty quick.
Here is a kid doing an example of the jump strategy. This video is bit more "raw", but I like it because it definitely shows how a kid would do it...mistakes and all!Â
Adding Decimals
Adding decimals with unequal place values