Question

Joyce uses the subtraction algorithm to subtract −35−55 and gets the answer −90. She connects this expression and answer to a number line model. Fill in the blanks to explain what is shown in the number line model.

Answer 1

The number line model shows a starting point at -35 and the endpoint at -90. The distance between these two points represents the subtraction of -55 from -35. Thus, the model illustrates that subtracting -55 from -35 leads to a result of -90.