[REBOL] 'Subtract vs '-

From: hallvard::ystad::oops-as::no at: 6-Jul-2004 11:45

Hello,

I have this console session:
>> a: 20.20.20
== 20.20.20
>> b: 10.10.10
== 10.10.10
>> a - b
== 10.10.10
>> a subtract b
** Script Error: subtract expected value2 argument of type: number pair char
money date time tuple
** Near: subtract b
>> minus: :-
>> a minus b
** Script Error: Cannot use negate on tuple! value
** Near: minus b
>>

Why is it that I can only get '- to work on tuples? What did I overlook?

HY

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