Robomath. Subtracting and adding
- Author:
- Janika Leoste
Solve the task
-37 - 23 + 5 + 12 =
–24 + 6 – 12 + 8 =
–12 + 11 + 4 – 9 =
Extra materials for robot experiments
- LEGO EV3 Driving Base model with all 4 sensors
- A tablet with an internet connection and the LEGO EV3 programming app
- Measuring tape or a metre long ruler
Program blocks used in the experiments
EXPERIMENT 1
Move the robot forward 4 times, 2 wheel rotations at a time.
The first time make it move at a speed that is equal to the answer of the first, second time of the second and third time of the third expression.
The last speed will be the sum of all the expressions. Before travelling the next distance put 1 second of pause.
Write up all of the answers, since they will be necessary in the next experiments.
Expressions:
- -37 - 23 + 5 + 12 =
- -24 + 6 -12 + 8 =
- -12 + 11 + 4 - 9 =
What is the sum of all three expressions?
Look at the solution:
Example of the solution
EXPERIMENT 2
Move the robot 4 times, 2 seconds at a time, using the absolute values of the answers from the previous experiment as the values for speed and steering direction. Before travelling the next distance put 1 second of pause.
Describe what did you robot do while following the program:
Look at the solution:
Example of the solution
EXPERIMENT 3
Move the motor 4 times with the motor degrees movement blocks, using the absolute values of the answers from the first experiment as speeds, the values of 1st and 3rd answers and absolute values of 2nd and 4th answers as steering direction and the absolute values of 1st and 3rd answers and values of 2nd and 4th answers multiplied by 10 as the motor degrees. Before travelling the next distance put 1 second of pause.
Describe what did you robot do while following the program:
