Luca is connecting a subtraction problem to a two-color counter model. He models the same problem in two ways to show how the subtraction algorithm works. What problem is Luca modeling, and what is Luca showing?
(1 point)
Responses
Luca is modeling 4−3. He is showing that 4−3 is equivalent to 4+3.
Luca is modeling 4 minus 3 . He is showing that 4 minus 3 is equivalent to 4 plus 3 .
Luca is modeling 4−(−3). He is showing that 4−(−3) is equivalent to 4+3.
Luca is modeling 4 minus left parenthesis negative 3 right parenthesis . He is showing that 4 minus left parenthesis negative 3 right parenthesis is equivalent to 4 plus 3 .
Luca is modeling −4−3. He is showing that −4−3 is equivalent to −4+(−3).
Luca is modeling negative 4 minus 3 . He is showing that negative 4 minus 3 is equivalent to negative 4 plus left parenthesis negative 3 right parenthesis .
Luca is modeling −4−(−3). He is showing that −4−(−3) is equivalent to −4+3.