### 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: 24x24 inches 36x36 inches 72x72 inches 96x96 inches 192x192 inches Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background:

#### Robot 1

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 0 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 2

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 6 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 3

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 12 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 4

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 18 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Perform a + (-b) + (-c)
Problem Statement:
Modify the red driveDistance blocks to move the tick mark from 0 to the red line. Then modify the green driveDistance blocks to move the tick mark from the red line to the green line. Finally, move the tick mark from the green line to the blue line. Refresh to start a new problem.
```/* Code generated by RoboBlockly v2.0 */

// This is an example of solution for 23+(-16)+(-11)
robot.traceColor("red", 9);
robot.traceColor("green", 4);
robot.traceColor("blue", 2);
```
 Blocks Save Blocks Load Blocks Show Ch Save Ch Workspace
Problem Statement:
Modify the red driveDistance blocks to move the tick mark from 0 to the red line. Then modify the green driveDistance blocks to move the tick mark from the red line to the green line. Finally, move the tick mark from the green line to the blue line. Refresh to start a new problem.

Time