mental math, addition, and subtraction
summary
the content focuses on enhancing mental math skills for gre prep, offering strategies to efficiently perform calculations without over-relying on a calculator.
- emphasizes the importance of mental math in saving time during the gre, suggesting that minimizing calculator use can prevent time crunches.
- introduces a method for adding and subtracting two-digit numbers by breaking them down into multiples of ten and single-digit numbers, facilitating easier mental calculations.
- explains a technique for simplifying subtraction when the smaller number has a larger ones digit, by adding the same amount to both numbers to keep the difference unchanged.
- encourages practice with these mental math tricks to build confidence and efficiency in handling quantitative sections of the gre.
chapters
00:09
the value of mental math
01:13
adding two-digit numbers
03:23
simplifying subtraction
05:40
practical application and practice
