Casio

The Casio fx-CG50 for IB Maths: the five skills every paper needs

The home MENU is a grid of icons (Run-Matrix, Statistics, Graph, Equation, Financial). Inside each one, the six function keys F1 to F6 drive the tabs at the bottom of the screen. F6 with an arrow means there are more tabs.

Exam status. Allowed in IB exams. Exam mode (SHIFT, MENU, F3 and F4) is required by some schools: it clears memory and turns the border green for the invigilator.

normalcdf · invNorm

Normal distribution on the Casio fx-CG50

MENU, Statistics, F5 DIST, F1 NORM, then F2 Ncd or F3 InvN. Casio asks for sigma BEFORE mu.

MENUStatisticsF5 DISTF1 NORM

Full steps, worked example, interactive checker and what to write

binompdf · binomcdf

Binomial distribution on the Casio fx-CG50

MENU, Statistics, F5 DIST, F5 BINOMIAL, then F1 Bpd or F2 Bcd. Bcd takes Lower and Upper, so "between" is direct.

MENUStatisticsF5 DISTF5 BINOMIALF1 BpdData: Variablex: 4Numtrial: 20p: 1÷6F1 CALC

Full steps, worked example, interactive checker and what to write

linear regression · exponential regression

Regression and correlation on the Casio fx-CG50

Statistics: type the data in List 1 and List 2, then F2 CALC, F3 REG, and choose the model. Linear is F1 X, exponential and power are behind F6.

MENUStatisticsList 1: 0 1 2 3 4 5List 2: 2.1 3.4 5.7 9.0 15.1 24.8F2 CALCF3 REG

Full steps, worked example and what to write

nSolve · polynomial roots

Solving equations on the Casio fx-CG50

MENU, Equation: F2 Polynomial for all roots, F3 Solver for any single equation. MENU, Graph, draw, then SHIFT F5 G-Solv, F5 INTSECT for crossings.

MENUEquationF2 PolynomialF2 Degree 3a=1, b=−4, c=1, d=3F1 SOLVEMENUEquationF3 Solvere^X=3−XEXEX: 1F6 SOLV

Full steps, worked example and what to write

TVM solver · finance solver

TVM and finance solver on the Casio fx-CG50

MENU, Financial, F2 Compound Interest. Fill the fields, then press the F key of the one you want (F1 n, F2 I%, F3 PV, F4 PMT, F5 FV).

MENUFinancialF2 Compound Interestn: 60I%: 4.8PV: 12000FV: 0P/Y: 12C/Y: 12

Full steps, worked example and what to write

The other calculators

Written by Pietro Meloni, PhD, IB Mathematics and Physics tutor. Keystrokes checked on TI-Nspire CX II OS 6, Casio fx-CG50 OS 3 and TI-84 Plus CE OS 5; older systems may number the menus differently. Not affiliated with the International Baccalaureate Organization, Texas Instruments or Casio. Found a key that has moved? Write to pietro@pietromeloni.com.

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