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25 Dec 2023, 11:09
Kudos
Bookmarks
I always end up reconfirming most of my subtractions, multiplications, etc during mocks. Are there any drills or blogs around this that I can leverage to improve my mental math and overall quant?
26 Dec 2023, 05:40
Kudos
Bookmarks
hi
i will give you a few tips.
Addition
Suppose you have to add 384 + 637.
Add the hundreth digits, 3 and 6 = 9 ,
Add tenths, 8 and 3 = 11
Update first addition by adding carryover - ie 1
9+ 1 = 10
Add units, 4 + 7 = 11
update by adding carryover 1
1 + 1 = 2
Thats it - sum is 1021
for substraction, start from small number and keep adding till u get to the larger number
suppose 94 - 48
48 + 6 = 54 + 40 = 94
difference = 40 + 6 = 46
mental math for multiplication and division are not required for GMAT. I have yet to see a GMAT question which involves lengthy multiplication and division.
i will give you a few tips.
Addition
Suppose you have to add 384 + 637.
Add the hundreth digits, 3 and 6 = 9 ,
Add tenths, 8 and 3 = 11
Update first addition by adding carryover - ie 1
9+ 1 = 10
Add units, 4 + 7 = 11
update by adding carryover 1
1 + 1 = 2
Thats it - sum is 1021
for substraction, start from small number and keep adding till u get to the larger number
suppose 94 - 48
48 + 6 = 54 + 40 = 94
difference = 40 + 6 = 46
mental math for multiplication and division are not required for GMAT. I have yet to see a GMAT question which involves lengthy multiplication and division.
29 Dec 2023, 09:40
Kudos
Bookmarks
Thanks! I would add:
Practice Regularly: Dedicate time to practice mental math daily. Start with simple calculations and gradually increase difficulty. Focus on addition, subtraction, multiplication, and division without relying on calculators.
Memorize Key Formulas and Multiplication Tables: Memorize essential formulas, squares, cubes, and common multiplication tables. Knowing these by heart can expedite calculations during the test.
Estimation Skills: Develop the ability to estimate calculations quickly. Approximating values helps verify answer choices and narrow down options, especially in data sufficiency questions.
Use Mental Math Techniques: Explore mental math techniques like breaking numbers into smaller components, using number properties (like divisibility rules), or applying shortcuts for calculations (e.g., multiplying by 25 or finding percentages mentally).
Apply Mental Math Strategies Consistently: Practice mental math while solving practice questions or mock tests. Refrain from using calculators or writing down every step unless absolutely necessary. This habit can significantly improve speed and accuracy during the actual exam.
Practice Regularly: Dedicate time to practice mental math daily. Start with simple calculations and gradually increase difficulty. Focus on addition, subtraction, multiplication, and division without relying on calculators.
Memorize Key Formulas and Multiplication Tables: Memorize essential formulas, squares, cubes, and common multiplication tables. Knowing these by heart can expedite calculations during the test.
Estimation Skills: Develop the ability to estimate calculations quickly. Approximating values helps verify answer choices and narrow down options, especially in data sufficiency questions.
Use Mental Math Techniques: Explore mental math techniques like breaking numbers into smaller components, using number properties (like divisibility rules), or applying shortcuts for calculations (e.g., multiplying by 25 or finding percentages mentally).
Apply Mental Math Strategies Consistently: Practice mental math while solving practice questions or mock tests. Refrain from using calculators or writing down every step unless absolutely necessary. This habit can significantly improve speed and accuracy during the actual exam.
