Saturday, February 21, 2026

Mathematics textbook author gives the human hand one finger too many

How many fingers on the human hand? Authors of a mathematics textbook appear to be confused.

A new textbook issued by the Secretariat of Public Education (SEP) for second-grade primary school students features an unusual image that could cause confusion in counting exercises: a human hand with an extra finger.

The department has acknowledged the error, attributing it to a misprint, but not before social media users went to town to mock the mistake.

“The new education model now considers that the new generation [of students] will evolve and mutate until they have six fingers,” teacher Fátima Loaiza Baltazar wrote on Facebook.

“It’s inclusive of people with six fingers on their hands,” one person commented, a thought echoed by another who wrote that “people with extra fingers have been made to feel invisible until now.”

In a statement that recognized the mistake in the image, the SEP also said that “there is no conceptual or didactic error” in the activity it accompanies, an exercise whose aim is to make students think about different ways to make measurements by using objects — or body parts — that are part of their everyday lives.

“These types of marginal errors . . . tend to show up, according to the editorial industry, in the order of four to five times in a copy of any kind of book and in almost every language,” the statement said.

The newspaper Milenio pointed out that on the very next page, there is a spelling mistake.

The SEP said the hand illustration error has now been corrected in the electronic version of the textbook, adding that teachers, students and parents can download and print it if they wish.

In the meantime, the new class of second-grade students across the country will do well to count on their own hands to ensure they come up with the answer they are looking for.

Source: El Universal (sp), Milenio (sp)

Have something to say? Paid Subscribers get all access to make & read comments.
Sheinbaum and two Mexican generals observe a military band on Army Day in Puebla

Mexico’s week in review: Sheinbaum says no to the US — and yes to Canada

1
The third week of February was a busy one for Mexico as it courted Canada, rebuffed Trump, racked up drug busts and caught a Supreme Court break on tariffs. Here are the week's biggest stories.

MND Local: Is San Miguel de Allende about to receive passenger rail service?

0
Is San Miguel de Allende set to get passenger rail service? President Sheinbaum says yes.
sad, unhappy Trump

US Supreme Court strikes down Trump’s tariffs: What does it mean for Mexico?

15
The ruling frees Mexico from paying certain Trump tariffs, such as the "fentanyl tariff" and the "reciprocal tariffs," though other exporting nations will probably get more relief than Mexico.
BETA Version - Powered by Perplexity