This number line has both negative and positive numbers. Copy the positive side of the number line on one color, and the negative on another. After the strips are cut out, glue the end to end, and laminate them. When the number lines are completed, use them as you would a positive, single directional number line (zero to twenty.)
Model the use of the number line. Example problems:
- 12 - 18 = ?
- (-4) + 8 = ?
- (-7) - 9 = ?
