13 + 5 in Spanish | Say It Like A Native In Class

Trece más cinco son dieciocho; also said as “trece más cinco es igual a dieciocho.”

You’ll see “13 + 5” in homework, a cashier’s mental math, a kid’s worksheet, or a quick check at work. The good news: Spanish has a few clean, natural ways to say it, and once you learn the pattern, you can say almost any simple equation without stopping to translate in your head.

This article gives you the exact phrases Spanish speakers use, how to say the equation out loud, what you’ll hear in school settings, and a bunch of practice lines you can steal for real life.

How To Say The Equation Out Loud

The most common spoken version is short and direct:

• Trece más cinco son dieciocho.

You can also use a slightly more “classroom” style that matches how many teachers read equations:

• Trece más cinco es igual a dieciocho.

Both are correct. The first one feels quick and conversational. The second one fits well when you’re reading math problems, writing steps, or explaining how you got an answer.

Pronunciation You Can Trust

Here’s the part people trip on: dieciocho. It’s “dee-eh-see-OH-cho,” with the stress on “OH.” Trece is “TREH-seh.” Cinco is “SEEN-koh.” Más has a clear “a” sound, like “mahs.”

If you want the line in one smooth run:

• Trece más cinco son dieciocho. (TREH-seh mahs SEEN-koh sohn dee-eh-see-OH-cho)

13 + 5 In Spanish With Natural Variations

Spanish gives you a few everyday ways to express “plus” and “equals.” They’re all built from the same core words, so you’re not memorizing a bunch of separate rules.

Ways To Say “Plus”

In math, the plus sign is más. People say it constantly, from first grade to adult life. If you’re reading a worksheet, you’ll almost always say más.

Ways To Say “Equals”

You’ll hear three main patterns:

• son (common when the result is a number): Dos más dos son cuatro.
• es (also common, especially when reading an equation): Dos más dos es cuatro.
• es igual a (common in classrooms and step-by-step explanations): Dos más dos es igual a cuatro.

If you’re wondering which one to pick, use son for the “sounds like a native” feel, and use es igual a when you want your line to feel like math class language.

What About “Y” For Addition

You might hear y used loosely to join numbers in casual talk, like when someone lists two amounts. In an actual equation, más is the clean choice. Many learning resources teach arithmetic that way, too, since it lines up with the written “+” sign. A handy list of common math symbols and the phrases tied to them is shown in SpanishDict’s math symbols guide.

Mini Lessons That Make The Pattern Stick

Most learners get the translation right, then hesitate when they speak. The fix is simple: get used to the rhythm of Spanish arithmetic.

Step 1: Say The Numbers Without Rushing

13 is trece. 5 is cinco. 18 is dieciocho. Say each one clearly before you try the full equation.

Step 2: Insert “Más” Like A Connector

Now say: trece más cinco. Pause for half a beat. That pause helps your brain treat it as one chunk.

Step 3: Add The Result Phrase

Finish with either:

• son dieciocho
• es dieciocho
• es igual a dieciocho

When you repeat that structure across a few problems, it stops feeling like translation and starts feeling like speech.

Common Mistakes And Clean Fixes

Mixing Up 16–19 Style Numbers

From 16 to 19, Spanish uses the “dieci-” pattern:

• 16: dieciséis
• 17: diecisiete
• 18: dieciocho
• 19: diecinueve

If you’re saying results out loud, those are the ones worth drilling.

Forgetting The Accent In “Más”

When you write it, más (more/plus) takes an accent. Without it, mas can mean “but” in formal writing. In speech, nobody hears the accent mark, so you’re safe. In writing, the accent keeps your math line tidy and clear.

Using English Word Order With “Equals”

English learners sometimes try to force “equals” as a verb in the same way. In Spanish, you’ll sound more natural with son, es, or es igual a. Those options keep your sentence flowing.

Number And Phrase Cheat Sheet

Below is a compact set of words you’ll reuse again and again. It’s meant for real use: saying equations, reading homework, and explaining steps.

What You See	What You Say In Spanish	Fast Use In A Sentence
13	trece	Trece más cinco…
5	cinco	…más cinco…
18	dieciocho	…son dieciocho.
+	más	Ocho más dos…
=	es / son	Dos más dos son cuatro.
=	es igual a	Diez más tres es igual a trece.
“How much is…?”	¿Cuánto es…?	¿Cuánto es trece más cinco?
addition	la suma	La suma da dieciocho.
result	el resultado	El resultado es dieciocho.

If you want a reliable reference for how Spanish treats cardinal numbers in writing and usage, the Real Academia Española’s guidance on numerals is a solid anchor for spelling and structure.

Where You’ll Hear These Phrases In Real Life

In A Classroom Or Homework Setting

Teachers often read a full line with “equals” wording. You’ll hear:

• Trece más cinco es igual a dieciocho.
• ¿Cuánto es trece más cinco?

That “¿Cuánto es…?” pattern is everywhere in school materials. It’s also a clean way to ask a friend to check your math without sounding stiff.

At A Store Or While Splitting A Bill

When people add quickly in conversation, the shorter “son” form tends to show up:

• Trece más cinco son dieciocho.

It sounds like a quick mental tally, which is exactly what it is.

In Written Work And Notes

If you’re writing steps, “es igual a” reads clean and avoids any doubt about meaning. It also matches many Spanish-language math books and learning sites.

When you want a quick reference for common math symbols and how people read them, this SpanishDict guide lays them out in a simple list: Math symbols in Spanish. :contentReference[oaicite:0]{index=0}

Spelling Notes That Keep Your Spanish Clean

Spanish number words follow patterns that make writing easier once you spot them. With 13 and 18, you’re in the “one word” zone, so you write trece and dieciocho as single words.

The RAE’s Diccionario panhispánico de dudas entry on cardinal numbers explains how cardinal numerals work and how they behave in real sentences, which helps when you move beyond short equations. RAE guidance on cardinal numbers is a dependable reference for this topic. :contentReference[oaicite:1]{index=1}

For “equals” wording, Spanish uses common words that also exist outside math. The RAE dictionary entry for igual is a useful check when you see phrases like es igual a in textbooks and want to ground the meaning. RAE dictionary entry for “igual” shows the core sense of the word. :contentReference[oaicite:2]{index=2}

Practice Set You Can Read Out Loud

Reading these out loud is the fastest way to make the structure feel normal. Say each line twice: once slow, once at a speaking pace.

Level 1: Short Additions

• Cinco más cinco son diez.
• Siete más seis son trece.
• Ocho más dos es diez.
• Once más cuatro es igual a quince.

Level 2: Ask And Answer

• ¿Cuánto es trece más cinco? Trece más cinco son dieciocho.
• ¿Cuánto es nueve más ocho? Nueve más ocho son diecisiete.
• ¿Cuánto es diez más seis? Diez más seis es dieciséis.

If you want audio-backed drills in a simple format, this page includes short arithmetic prompts and answers you can read and mimic: 123TeachMe simple math phrases. :contentReference[oaicite:3]{index=3}

Fast Reference Table For Saying Addition Clearly

Use this table as a quick pick-list when you’re choosing how to speak an equation in Spanish.

Your Goal	Spanish Pattern	A Clean Model Line
Say it casually	[number] + [number] + son + [result]	Trece más cinco son dieciocho.
Say it like school math	[number] + [number] + es igual a + [result]	Trece más cinco es igual a dieciocho.
Ask the question	¿Cuánto es…?	¿Cuánto es trece más cinco?
State the result in words	El resultado es…	El resultado es dieciocho.
Talk about the operation	la suma	La suma da dieciocho.
Double-check politely	¿Está bien así?	Trece más cinco son dieciocho, ¿está bien así?
Show your method in steps	Primero… luego…	Primero sumo trece y cinco; luego escribo dieciocho.

A Quick Way To Make This Feel Automatic

Here’s a simple drill that works in under five minutes:

1. Write five additions that land between 10 and 20.
2. Read each one using “son” twice.
3. Read each one using “es igual a” once.
4. Ask one of them using “¿Cuánto es…?” then answer it right away.

That mix builds flexibility. You’re not locked into one fixed phrase, so you’ll understand what you hear and also say it in a way that fits the moment.

Final Check On The Original Expression

If you only need the clean, copy-ready line for a worksheet or a spoken answer, use either of these:

• Trece más cinco son dieciocho.
• Trece más cinco es igual a dieciocho.