Jessica C. answered 05/28/26
Experienced Elementary Teacher with Masters and Gifted Ed Certified
Relying too heavily on calculators can absolutely cause mental math and basic computation skills to weaken over time. Many students become so used to having quick access to a calculator that solving simple equations mentally can start to feel more difficult or slower than it once did.
My best advice for strengthening your mental math skills for the ASVAB is to revisit foundational math concepts and practice them consistently without a calculator. Focus on skills like multiplication facts, long division, fractions, decimals, percentages, and basic algebraic thinking. Do not be afraid to use pencil and paper while practicing. Writing out the steps helps strengthen number sense and problem-solving skills over time.
It can also help to practice small mental math exercises throughout the day, such as estimating totals while shopping, solving simple equations in your head, or timing yourself on basic math drills. Just like any other muscle, the brain becomes stronger and more efficient with repeated practice. The more consistently you work those foundational skills, the more confident and automatic they will become during the ASVAB.