
Mental Math Tricks: Master 29 Shortcuts and Fix 2 Faulty Flashcards
Learn mental math shortcuts with 47 flashcards: multiply by 9, 11 and 99, square numbers ending in 5, quick percentages and divisibility tests, plus 2 fixes.
Study guides and flashcard decks to learn Mathematics faster with active recall and spaced repetition.

Learn mental math shortcuts with 47 flashcards: multiply by 9, 11 and 99, square numbers ending in 5, quick percentages and divisibility tests, plus 2 fixes.

Study multivariable calculus with 49 flashcards: gradient, Jacobian, Hessian, Stokes, Green and divergence theorems — plus the formulas the deck leaves out.

Study limits with 70 real flashcards: epsilon-delta, squeeze theorem, sin(x)/x, Cauchy sequences, two cards to rewrite and the continuity cards to add.

Memorize metric and imperial unit conversions with 96 flashcards: exact anchors like 2.54 cm, °F/°C formulas, SI prefixes, gallons, PSI and an updated STP.

Master coordinate geometry with 54 flashcards: lines, distance, conics, planes and polar coordinates, plus the 5 cards to fix and the worked examples to add.

Study polynomials and rational expressions with 78 flashcards: degree, factoring, synthetic division, remainder theorem, multiplicity and partial fractions.

Learn set theory basics: union, intersection, symmetric difference, power sets, Cantor's theorem, Russell's paradox and ZFC, with worked examples and tips.

Learn the law of sines and cosines: SAS, SSS, AAS solving, the ambiguous SSA case, proofs and spherical versions, plus which flashcards to fix first.

Learn basic algebra with deck YL5272: 46 worked solutions for linear equations and inequalities, plus the systems and interval notation you must add yourself.

Master circle geometry with deck OP2222: arc length, sector area, inscribed angle and tangent theorems, circle equations, plus the cards you should fix first.

Deck EP8443 covers regression, the normal distribution and hypothesis testing in 97 cards. What it teaches well, and the six cards you should add first.

Work through Flip It deck AP7391: eleven convergence tests, Taylor and Maclaurin series, and a differential-equations gallery, with the gaps to fill yourself.