AB-991EX

Description

About the AB-991EX

The AB-991EX is the flagship model in the ABAKO scientific-calculator range. Its natural textbook display presents fractions, powers, roots and mathematical expressions in a familiar format, while its organised menu provides access to everyday and advanced calculation modes.

With 552 functions, it supports equations, matrices, vectors, complex numbers, numerical differentiation and integration, statistics, distributions, inequalities, ratios, tables and spreadsheets.

Key Features

• 552 functions
• Natural textbook display
• Simultaneous and polynomial equations
• Matrix, vector and complex-number calculations
• Numerical differentiation and integration
• Statistics and distribution calculations
• Spreadsheet, table, inequality and ratio modes
• Scientific constants and metric conversions

The 30-Second Check

The AB-991EX also supports the ABAKO 30-Second Check: solve the question manually, check the result on the calculator, compare it with the manual solution, correct the working if the answers do not agree, and confirm final-answer requirements such as units, form, accuracy and all required roots.

The calculator is a checking tool; students must still show required working.

Built Around Classroom Use

ABAKO works with mathematics educators across Pakistan through teacher training, classroom resources and the 30-Second Check.

Best For

O Level, IGCSE, A Level, Matric, Intermediate and university students who need ABAKO’s widest range of scientific and advanced mathematical functions.

Warranty

Backed by ABAKO’s one-year replacement warranty on eligible purchases through authorised channels. Keep proof of purchase; warranty terms apply.

Recommended for O Level and A Level Mathematics

ABAKO recommends the AB-991EX for Cambridge O Level Mathematics Paper 2 and Cambridge International AS & A Level Mathematics examinations.

Its non-programmable, non-graphical design and numerical—not symbolic—calculation functions match Cambridge’s published calculator requirements. Students must still show all required working.

Calculators are not permitted in Cambridge O Level Mathematics Paper 1.