Show the numbers of + and − pieces represented by each expression below. Sketch each model and state the number that it represents.
Sketch a model of the integers.
From the model, determine what the expression represents.
For more help, look at the Math Notes in Lesson 2.3.1.
Use part (a) as a guide for this problem. Remember to look for and eliminate zeros.
Draw a diagram to model this expression. This expression represents 0.
Use part (a) as a guide for solving this problem.