Cero más diez es diez.

Zero plus ten is ten.

Breakdown of Cero más diez es diez.

• ser: to be
• más: more
• diez: ten
• cero: zero

Questions & Answers about Cero más diez es diez.

Why does más have an accent mark?

The accent in más is required because it is the word for more or plus.

It helps distinguish it from mas without an accent, which is a more formal/literary word meaning but.

So in math:

• más = plus
• mas = but

In this sentence, más means plus, so the accent is necessary.

Why is the sentence Cero más diez es diez and not Cero más diez son diez?

Here, es is used because the whole expression cero más diez is being treated as one calculation or one result.

So the idea is:

• zero plus ten = one mathematical expression
• that expression is ten

That is why es sounds natural.

Also, in Spanish, math statements are often said this way:

• Dos más dos es cuatro
• Cinco menos uno es cuatro

You may also hear other patterns in arithmetic, especially with y:

• Dos y dos son cuatro

So es in your sentence is completely normal.

What exactly does es mean here?