Question

Conrad subtracts −12−(−3) using the subtraction algorithm and finds that the answer is −9. He connects this expression and answer to a two-color counter model. Fill in the blanks to explain what is shown in the two-color counter model.

(2 points)
Conrad starts with 12 negative counters and then takes away
negative counters. He is left with
negative counters. Therefore, −12−(−3)=
.

Answer 1

Conrad starts with 12 negative counters and then takes away 3 negative counters. He is left with 9 negative counters. Therefore, −12−(−3)= -9.