Model Integer Subtraction

Make Connections

Performance Task

Ways of Thinking: Make Connections

Take notes about your classmates’ approaches to subtracting positive and negative numbers.

Hint:

As your classmates present, ask questions such as:

  • How did you know which direction to go for the second number?
  • Can you show me an example to help me understand your generalization?
  • Did you test your generalization to make sure it works for all the subtraction problems that you wrote as addition problems earlier in the lesson?
  • Why does subtracting a negative number always result in an answer that is greater than the first number?