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Show the numbers of and tiles represented by each expression below. Sketch each model and state the number that it represents.  


    If you need help starting the problem, look at the Math Notes box in Lesson 2.2.4.

    Begin by sketching a model of the integers.

    Use the model you just sketched to help you determine what number the expression represents.

    This expression represents .


    Use part (a) as a guide for this problem. Remember to look for and eliminate zeros.

    This expression represents . Remember to draw a diagram to model this expression.


    Use part (a) as a guide for solving this problem.