### Learning Math and Coding with Robots

 Grid: Tics Lines: Width px Hash Lines: Width px Labels: Font px Trace Lines: Robot 1: Width px Robot 2: Width px Robot 3: Width px Robot 4: Width px
 Axes: x-axis y-axis Show Grid Grid: 20x20 cm 30x30 cm 60x60 cm 100x100 cm 200x200 cm Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background:

#### Robot 1

 Initial Position: ( cm, cm) Initial Angle: deg Current Position: (0 cm, 0 cm) Current Angle: 0 deg Wheel Radius: 4.45 cm4.13 cm5.08 cm Track Width: cm

#### Robot 2

 Initial Position: ( cm, cm) Initial Angle: deg Current Position: (0 cm, 5 cm) Current Angle: 0 deg Wheel Radius: 4.45 cm4.13 cm5.08 cm Track Width: cm

#### Robot 3

 Initial Position: ( cm, cm) Initial Angle: deg Current Position: (0 cm, 10 cm) Current Angle: 0 deg Wheel Radius: 4.45 cm4.13 cm5.08 cm Track Width: cm

#### Robot 4

 Initial Position: ( cm, cm) Initial Angle: deg Current Position: (0 cm, 15 cm) Current Angle: 0 deg Wheel Radius: 4.45 cm4.13 cm5.08 cm Track Width: cm

Perform a + b + (- c)
Problem Statement:
Add the numbers a + b + (-c) on the number line. Move the robot tick mark along the number line, first to the red line, then to the green line, and finally to the blue line with the three preplaced driveDistance blocks. Refresh to try another problem.
```/* Code generated by RoboBlockly v2.0 */

// An example of a solution for 17 + 12 + (-6)
robot.traceColor("red", 7);