Because this is a real or general condition. Spanish normally uses:
So:
This means something like a general truth: if I know how to add and subtract well, then calculations become easier for me.
You would use the subjunctive in a different kind of hypothetical structure, for example:
Because Spanish often uses the infinitive to talk about an action in a general sense.
Here, sumar y restar means adding and subtracting or to add and subtract in a general skill-based sense.
This is very common in Spanish:
So sé sumar y restar means I know how to add and subtract.
It means I know how to add and subtract.
In Spanish, after saber, you can use an infinitive directly to mean to know how to do something.
So saber + infinitive is a very useful pattern.
Bien means well, and it modifies sumar y restar.
So:
It tells you the person is not just able to do those operations, but does them correctly or skillfully.
Its position is natural after the verbs:
You could also say something more explicit like:
But that sounds more repetitive.
Here luego means something like then, after that, or as a result.
It connects the first idea with the consequence:
In this sentence, luego does not mean immediately. It simply marks the next logical step.
Also, in Spanish from Spain, luego is very common in everyday language, though depending on context it can mean:
Here the best sense is then / as a result.
Because resultar is being used to express how something is for someone or turns out for someone.
The me means to me / for me.
So the structure is roughly:
Using resultar makes it sound a bit more natural and personal than a plain es más fácil in this context.
The subject is the whole infinitive phrase:
That entire phrase functions like doing any calculation in English.
So the sentence structure is basically:
Literally, it is close to:
Because the subject is treated as a single idea, the verb is singular:
Yes. That would also be correct:
But it is a bit less elegant and slightly less natural than me resulta más fácil.
Common options are:
All are possible, but me resulta más fácil is a very natural choice here.
Because cualquier is the shortened form of cualquiera used before a singular noun.
Examples:
So in this sentence, since it comes directly before cálculo, Spanish uses cualquier.
Because cualquier normally goes with a singular countable noun.
So:
Even though English sometimes makes learners think of a plural idea, Spanish uses the singular here.
If you wanted a plural idea, you would usually phrase it differently, for example:
But cualquier cálculo is perfectly natural.
Because hacer un cálculo or hacer cálculos is a normal Spanish collocation.
Just as English says do a calculation, Spanish often says hacer un cálculo.
So:
Other verbs are possible in some contexts, such as:
But hacer is the most everyday and natural option.
In standard writing, yes, it is normal and recommended to put a comma after an initial si clause.
So this is the usual punctuation:
That comma helps separate the condition from the main clause.
If the order were reversed, you normally would not use a comma: