One-step arithmetic stays in your head or on scratch paper. Opening Desmos for 12 × 8 costs more time than it saves. Desmos access is in Desmos on the ACT.
Graph when the algebra is the work
Systems, intercepts, and messy equations are graph-first jobs. A single percent or a 3-4-5 check is not. When not to graph at all is in when not to graph.
Checking a finished value is in checking your work in Desmos. Percent arithmetic on the keypad is in percent calculations.
The bottom line
Tiny arithmetic: skip the graph. Heavy algebra: open Desmos.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.