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Explains the rules and gives examples for when to borrow and when not to borrow when subtracting. -Students can keep in their folders to reference during subtraction. -Can be hung in the classroom as a poster. -Can create a tune/song to go with the rules. Contains 2 versions: 1 with 2-digit minuends & 1 with 3-digit minuends. My students from past years still remember the chant we used with our poster!