gen.py can generate a list of probelems for addition and substraction for a range specified. Found it useful for kids to solve thise kinds of problems.

Output will be written to standard output so needs to me redirected to a file.

There are some options to use with the script:

• -s key will make output data ordered
• --range will specify the maximum number (does not quite work for odd numbers for addition), default value is 20
• --operation can be either addition or substraction, default is addition
• --columns number of columns in csv file, default value is 4