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Subtracting Decimals
Jessie, Ming, Chris, and Luis explain how they subtract 0.85 − 0.2.
Ming uses a number line:
Chris represents 0.85 with base-ten pieces. The flat is one.
Luis says, “0.85 is 
and 0.2 is 
. I find common denominators.”
Learn about other strategies on the Subtract Decimals with Grids and Number Lines pages in the Student Activity Book.