### Home > CC2MN > Chapter cc23 > Lesson cc23.1.2 > Problem 3-19

3-19.

Show the numbers of

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.