FX-991CW Calculator

basic information

Product features

• Not programmable
• Do not create graphs

Product Type

• Not programmable
• Do not create graphs

Number of digits

• 10 + 2 digits

LCD display

• Display natural written text
• Symbols list
• Dot matrix display
• High accuracy
• 4-gradient screen

Key properties

• Plastic keys

Key functions

• Negative sign
• Shutdown

memory

• Variants: 9
• List of variables
• Answer memory
• Function memory
• Memory protection
• Reset function

Electrical feeding unit

• Solar and battery
• Approximate main battery life is 2 years
• Auto power off

Size(Depth x Width x Height)

• 162 x 77 x 10.7 mm

the weight

• 95 g

Accessories

• Hard cover

Display settings

Display format settings

• Number format: fixed
• Number format: scientific
• Number format: normal
• Engineering symbol
• Engineering coding
• Convert fractions/decimals
• Angle measurement unit (degree, radian, grad)
• Improper/mixed fraction
• Conversion between hexadecimal/decimal system
• Number separator

Arithmetic functions

Basic arithmetic operations

• Basic arithmetic operations
• Calculate parentheses
• Fraction calculations
• Degree, minute, second calculations (seventy system)
• Arithmetic operations of the multiplicative inverse
• Calculate percentage (scientific calculator function)
• Calculate the ratio
• Factorial calculation function
• π
• Calculation using √ and π
• Rounding function

Advanced mathematical operations

• Transcendent number: e
• Base-n calculation
• Logical operations
• The process of calculating complex numbers
• Matrix arithmetic operations
• Vector calculations
• Calculate the ratio
• Spreadsheet
• Digital table
• Simultaneous equation
• Polynomial equation
• Calculations of inequalities
• List-based STAT data editor
• Univariate statistics
• Bivariate statistics and regression operations
• Distribution calculations
• Mathbox (coin toss, dice toss)

Applied mathematical operations

• Continuous calculations
• Playback function
• Multiplayer function
• to retreat
• SOLVE function

Job Features

Basic functions

• Basic mathematical functions
• Independent key x
• Absolute value calculations
• Square and square root (x2/√)
• Power and radical (xy/x√)
• Trigonometric functions, inverse trigonometric functions (sin/cos/tan/sin–1/cos–1/tan–1)
• Hyperbolic functions, inverse hyperbolic functions (sinh/cosh/tanh/sinh–1/cosh–1/tanh–1)
• Exponential, logarithmic (log, ln, 10x, ex)
• Logarithmic base definite
• Converting between coordinate systems
• Match/Switch
• Prime factorization
• Generate a random number
• Generate a random integer
• Plural
• Differentiation calculation
• Integration calculations

Jobs related to physics and chemistry

• Scientific constants
• Metric conversion function

Statistical functions

Statistical data

• List-based STAT data editor

Compatibility with tests

Allowed in tests

• GCSE/AS/A Level

Peripherals

Connect to peripheral devices

• QR code
• Verify authenticity