Optimal letspro.edu.vncation tools realized through a design that emphasizes comfort in the hand, legibility, and usability through the pursuit of simplicity

Instantaneous key recognition và ease of operation, the result of careful attention to lớn design details

More comfortable in the hand!

A rounded thiết kế that fits naturally in the hand và a slim body that’s comfortable lớn hold

Attachable & detachable in any direction!

Hard case that’s attachable & detachable in any direction for greater ease of use

More legible!

The keys have been made rectangular, making them easier lớn press. They are also easier to lớn read because of larger text.

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Easier lớn use!

Highly visible, easy-to-press cursor keys và function keys

The photo shows the fx-991ES PLUS 2nd edition.

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2 quality Authentic quality

Excellent unique and authentication ensure confidence và peace of mind for use in letspro.edu.vncational settings

1Tough & Sustainable

letspro.edu.vn has established three criteria lớn ensure excellent chất lượng in the ES PLUS series.

1.Wear-resistant printing

2,000-cycle wear testing

Since ES PLUS calculators are products used for many years as learning tools, the keys are made of a material that offers high durability & resistance to print peeling.

2.Drop-resistant body

Drop testing from a height of 75 cm

The high product quality prevents malfunction or breakage when a calculator is dropped.

3.Environmentally friendly

Compliant with RoHS environmental regulations

The materials used in ES PLUS series calculators comply with European RoHS environmental regulations, an international standard.

*Complies with DEHP, BBP, DBP, và DIBP

These three quality features ensure that letspro.edu.vn ES PLUS series calculators are letspro.edu.vncational tools that effectively tư vấn learning.

2Authenticity Check

Two methods enable authenticity checking before và after purchase.Furthermore, Premium content is available khổng lồ registered users of genuine ES PLUS series calculators.

Web Authenticity check System

There are two website Authenticity check methods. Confirm sản phẩm authenticity by using a smartphone to scan a QR code attached to lớn the hàng hóa package or shown on the calculator display.

Before purchase

Check on the calculator packaging


A hologram sticker is affixed lớn the package.Please confirm the sticker.

The photo shows the fx-991ES PLUS 2nd edition.

Note: The example shown is a simulated QR Code.


Read the QR Code section of the hologram sticker affixed to lớn the package with your smartphone.


Go to the QR Code link. One of the three pages below will appear.

Likely to lớn be a genuine product.

May not be a genuine product.

Not a genuine product. Please vị not purchase.

Note: The web Authenticity check estimates the authenticity of the hologram sticker based on QR Code read status trends. This kiểm tra does not necessarily guarantee the sản phẩm is genuine.

Hologram sticker

A QR Code and sticker printed with a hologram as shown below are affixed khổng lồ the hàng hóa package.

The hologram has an iridescent rainbow màu sắc section & a shiny white section, và the letspro.edu.vn hình ảnh sản phẩm is visible.

Xem thêm: Nhạc Âu Mỹ Hay Nhất 2012 - Những Bài Hát Âu Mỹ Hay Nhất 2012

Note: This differs from the actual colors because màu sắc shades vary depending on the direction of the light. The hologram sticker has the following characteristics that make it difficult to lớn copy.

When the sticker is tilted khổng lồ the left & right, the màu sắc changes. When the sticker is rotated, the shading is reversed.

Note: A hologram sticker is affixed in limited countries.

Use the above characteristics to lớn authenticate a product.

After purchase

Check on the sản phẩm display


From the mode selection screen, press the 0 key lớn display a QR code on the calculator display.

The photo shows the fx-991ES PLUS 2nd edition.

Note: The example shown is a simulated QR Code.


Scan the QR code with a điện thoại cảm ứng thông minh to go to lớn the linked webpage.


Choose Authenticity kiểm tra or User"s Guide.

Authenticity Check

Go to lớn the QR Code link. One of the two pages below will appear.

Likely to be a genuine product.

Not a genuine product.Please vì not purchase.

User"s guide

Go khổng lồ the User’s Guide Page on website.

“QR code” is a registered trademark of Denso Wave Incorporated in japan and other countries

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3 Function Natural Textbook Display

Features Natural Textbook Display format for displaying equations & calculation results just as they appear in textbooks

Fraction và square root



Statistical calculations

Equation calculations

Complex number calculations

Matrix calculations

Vector calculations

SOLVE calculations

CALC calculations

Integration calculations

Differential calculations

Scientific constants

Metric conversions

Natural Textbook Display models that make it easy to teach and easy to learn!

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4 Premium content A variety of original letspro.edu.vn nội dung is available khổng lồ make learning mathematics fun.

Users can access this nội dung by registering after the authentication check.

1Math Game

Become familiar with mathematics while playing a fun game.

Available languages:English, Thai, Indonesian

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Enjoy an original manga linked khổng lồ the math game.

Available languages:English, Thai, Indonesian

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3Certificate of Authenticity

Download the e-certificate of authenticity with your name và unique identifier code.

Available languages:English, Thai, Indonesian, Bengali, Traditional Chinese, Spanish, Portuguese, Arabic

4Mock Exam Papers and Exam Preparation Booklet

These books use the fx-991EX when illustrating how lớn use the calculators.

Mock Exam Papers :The booklet contains mock exams & tips for use in class.

Available in Pakistan only *

Exam Preparation Booklet :Commentary & answers

Available in Bangladesh only *