1.2 Test-Day Tools: The TI-30XS Multiview Calculator & the GED Formula Sheet

Test-Day Tools: The TI-30XS Multiview Calculator & the GED Formula Sheet

Quick Answer: On the GED Mathematical Reasoning test, an onscreen Texas Instruments TI-30XS Multiview scientific calculator is available for items 6 through 46 (you may also bring your own physical TI-30XS Multiview to use instead of the onscreen version); items 1–5 must be solved without any calculator. A formula sheet is provided for the entire test, covering area, perimeter, circumference, 3-D surface area and volume, mean/median, and several algebra formulas — but it does not include percent, probability, or exponent-rule formulas, all of which you still need to memorize.

Why the Tools Matter as Much as the Math

Two things make GED Math different from a typical paper math test: you get a real scientific calculator for most of the test, and you get a formula sheet handed to you rather than having to recall every formula from memory. Both are meant to let you focus on applying math rather than recalling it — but only if you already know how to use them. Candidates who have never touched a TI-30XS Multiview, or who assume the formula sheet covers everything, lose time fumbling with an unfamiliar tool or trying to recall a formula that was sitting on the screen the whole time.

The Calculator: What's Allowed and When

The TI-30XS Multiview displays fractions, exponents, and roots the way they would appear in a textbook (a genuine stacked fraction bar, not a decimal), and it can toggle between fraction and decimal display with a single key. It respects standard order of operations automatically, so typing 3 + 4 × 2 correctly returns 11, not 14 — you do not need extra parentheses for basic operation order, though you should add them for anything you want grouped differently (like (3 + 4) × 2). Learn where the squared, cube, square-root, and cube-root keys are before test day; hunting for them during the real test wastes minutes you don't have in a 115-minute exam.

The first 5 items are calculator-prohibited on purpose — they test whether you have basic number sense: can you compare fractions, estimate a reasonable answer, or perform simple arithmetic without leaning on a machine. Practicing mental math and quick fraction/decimal conversions is the single best way to protect those 5 items.

The Formula Sheet: What's On It

GED Testing Service provides an onscreen formula sheet for the entire test (not just the calculator-allowed section). Here is everything it contains:

Area formulas

Perimeter and circumference

Surface area and volume of 3-D figures

(where p = perimeter of the base, s = slant height, B = area of the base)

Data: mean is the total of a data set's values divided by the number of elements; median is the middle value of an ordered odd-count data set, or the average of the two middle values for an even-count set.

Algebra: slope m = (y₂ − y₁) / (x₂ − x₁); slope-intercept form y = mx + b; point-slope form y − y₁ = m(x − x₁); standard form of a quadratic y = ax² + bx + c; the quadratic formula x = (−b ± √(b² − 4ac)) / 2a; the Pythagorean theorem a² + b² = c²; simple interest I = Prt; the distance formula d = rt; and total cost = number of units × price per unit.

What's Missing — and Must Be Memorized

The formula sheet is deceptively short. It does not include: the percent formula (part = percent × whole), probability formulas (probability = favorable outcomes ÷ total outcomes), the counting/permutation/combination formulas, or the rules for exponents (product rule, power rule, negative exponents). These show up constantly in Quantitative Problem Solving items (Chapters 2, 3, and 6), so treat them as must-memorize even though the sheet feels comprehensive at a glance.

A Realistic Scenario

Suppose item 9 gives you a cylinder's radius and height and asks for its volume. You pull up the formula sheet, find V = πr²h, and correctly plug in the numbers — that's the formula sheet doing its job. Now suppose item 22 asks, "A shirt's price increased from $40 to $46; what is the percent increase?" There is no percent-increase formula on the sheet. You need to already know that percent change = (new − old) ÷ old × 100, then use the calculator only for the arithmetic. Confusing "the sheet has geometry formulas" with "the sheet has all formulas" is one of the most common traps first-time test-takers fall into.

Key Takeaways

• The onscreen (or physical) TI-30XS Multiview is available for items 6–46; items 1–5 are calculator-free, so number-sense fluency matters.
• The formula sheet covers area, perimeter, circumference, 3-D surface area/volume, mean/median, and eight algebra formulas — memorize the rest (percents, probability, counting techniques, exponent rules).
• Practice locating exponent and root keys on the TI-30XS Multiview before test day; fumbling with the calculator interface costs real minutes.
• Knowing which formula to apply to a word problem is a separate skill from having the formula in front of you — practice identifying the right formula, not just plugging into it.