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.
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.
The number line model would show a starting point at -35. From there, Joyce would subtract 55, which means she would move 55 units to the left on the number line. The resulting point would be at -90, which reflects her answer.
