# Solve Math Problems

Arithmetic operators are useful for doing calculations in your program.  In this activity, we’ll focus on the basics:

• assignment (=)
• subtraction (-)
• multiplication (*)
• division (/)
• modulus (%, the remainder of a division calculation)

### Example: simple_math.py

The example script simple_math.py uses the addition operator (+) to add the variables a and b together. The assignment operator (=) is used to store the result in the variable c.    It also displays the result on the micro:bit.

• Enter, save, and flash simple_math.py to your micro:bit, then watch the display.
```#simple_math.py

from microbit import *

a = 89
b = 42
c = a + b

display.scroll("a + b = ")
display.scroll(c)```

### Your Turn – Experiment with Other Arithmetic Operators

You still have -, *, / and % to try out!

• In simple_math.py replace the addition (+) operator with the subtraction (-) operator. Be sure to replace both instances of + in the program.
• Save and  re-flash the program to the micro:bit.
• Verify the result on the display.
• Repeat for the multiplication (*), division (/) and modulus (%) operators.