Mental Gymnastics

Lainons, I need some help and suggestions. I never memorized my times tables, and now whenever I calculate things, I do so like a computer. I do successive additions and I even go so far as to break up calculations into multiples of 2, because adding 2 numbers is easy. For example: -> 7*9 -> 9 + 9 = 18 -> 9 * 4 = 18 + 18 = 36 -> 9 * 8 = 2 * (9 * 4) = 36 + 36 = 72 -> 72 - 9 = 9 * 7 = 61 + 2 = 63 These kinds of calculations get even more convoluted with larger numbers, as I have some random parts of the tables memorized (i.e. 6 * 6 = 36) and incorporate that into it. Don't even ask how I manage to do division. I wanted to try learning with book attached, but as it turns out, being able to do basic multiplication instantly (recall opposed to calculation) is a requisite. Is there some way to memorize the tables that doesn't involve wrote learning or a 4 year olds singalong song? >flood detected >post discarded :( I have tried to post for the past 15 minutes :(

>>75762 Anon why do you do this? I would just do: >7*9 >Ok i know that 7*10 is 70 so >7*9 = 70 - 9 = 63 or maybe >13*13 >is 13 * 10 + 13 * 3 >130 + i just count 13 * 3 very fast (like 13 -> 26 -> 39 ) I do this for everything, isn't this easier or normal? I never memorized anything. Or maybe is me mixing introvert intuition and thinking, anyway I could never do operations in that way. What comes to you as more natural? I'm curious

>>75762 >Is there some way to memorize the tables that doesn't involve wrote learning Rote* Repetition is important for memorization, so no.

>>75762 Multiples of 9 09 = 1*9 18 = 2*9 27 = 3*9 36 = 4*9 45 = 5*9 54 = 6*9 63 = 7*9 72 = 8*9 81 = 9*9 90 = 10 * 9 Leftmost digit: count up from zero rightmost digit: count down from 9 works for everything up to 10

> Is there some way to memorize the tables that doesn't involve rote learning or a 4 year olds singalong song? Possibly. Can you instantly memorize the whole table at a glance? If not you need to repeat it. Just do some problems. If you work on times table worksheets you can find online for like 30 minutes a day, you’ll probably be done in a week.

>>75762 this seems like something an actual autistic person would do. I just know what 7*9 is, I guess it's memorized but even if not I will just look at it and see 70, then subtract 7 and I have 63. As for 13*13 I see 130 + (13*3)=169. Sometimes I don't know how I get answers, a number comes into my head and then I check it to make sure I'm not wrong.

>>75763 Plus unless you're like an astronaut or working at a nuclear reactor, very rarely in real life do you actually need to do math with any kind of precision. In most cases it would be perfectly fine to say "13 times 13 is more than 130"

>>75770 130 plus 13 *3 which is 39 adds up to 169 It isn't even hard.

>>75773 Oh wow. You did some sums. So impressive. I'm amazed. I will never forget that this happened for the rest of my life. You're like, the most talented person in the world.

>>75762 I have that book and the DVD set, yet never finished either. I keep intending to do so. Anyway, it's usually easy to use prime factorization for these kinds of problems. To multiply seven by nine easily, I can turn it into seven times three times three, and from there twenty-one times three, which is very obviously sixty-three. The old halving and doubling algorithm is also easy and simple, and something early computers used.

>>75762 >I never memorized my times tables I thought it was a meme but apparently not. I don't think there is any point in actually memorizing the entire table. Like >>75763 I start with expressions I quickly know the answer to. If some expressions come up frequently chances are you'll learn the answer subconsciously anyway, e.g. I can convert between binary/octal/decimal/hex fairly well in my head since it comes up so often. Ditto for sin, cos etc.

The way to learn your times tables is to practice them with a time constraint, like how you get better at a videogame. Here is a python script that gives you a 5 minute quiz similar to what I remember having to do repeatedly in 4th grade (shoutouts to Mr C). IIRC a large portion of that 4th grade class was ultimately able to 100% it. Just keep taking it (or another similar test, there's some online) until your score improves enough. If you're wasting too much time on calculations, just guess the answers instead of thinking about them, eventually your memory/pattern recognition gets good enough to always guess right. import random import time def ask_question(): num1 = random.randint(2, 12) num2 = random.randint(2, 12) answer = num1 * num2 return num1, num2, answer def calculate_bonus(time_left, duration): # Bonus based on the percentage of remaining time return (time_left / duration) * 100 def multiplication_test(duration, total_questions): start_time = time.time() end_time = start_time + duration correct_answers = 0 questions_attempted = 0 while time.time() < end_time and questions_attempted < total_questions: num1, num2, correct_answer = ask_question() user_answer = input(f"{num1} x {num2}? ") if not user_answer.isdigit(): print("Please enter a valid number.") continue if int(user_answer) == correct_answer: print("Correct!") correct_answers += 1 else: print(f"Wrong. The correct answer is {correct_answer}.") questions_attempted += 1 remaining_time = int(end_time - time.time()) print(f"Time left: {remaining_time // 60} minutes and {remaining_time % 60} seconds.") score = correct_answers / total_questions final_message = "Time's up!" if questions_attempted == total_questions: final_message = "All questions completed! Great job!" if correct_answers == total_questions and time.time() < end_time: bonus = calculate_bonus(end_time - time.time(), duration) score += bonus / 100 # Adding bonus as a percentage to the score final_message = "All questions answered correctly before time! Extraordinary performance!" print(final_message) print(f"Your score is {correct_answers}/{total_questions} ({score:.2%}).") # Set parameters duration = 5 * 60 # 5 minutes total_questions = 60 # Start the test multiplication_test(duration, total_questions) (if you get them all right your remaining time is added to your score as a bonus) fwiw I took the test and got a 93%, so I'm a bit worse than a practiced 4th grader. Curious what scores others here would get.

>>75763 I memorized the single-digit times tables because it's just faster. But also yes this is the way to do mental math.

>>76403 Just did the test, never strictly "memorized" the table (I'm >>76400). Got 59/60 (98.33%) with 2m41s remaining. I got 3 * 9 wrong as I misread it and entered 21.

>>75762 My mind is so foggy and slogged down that despite knowing the methods to do these things, the brain won't actually do it. It never feels fast. It never feels clean. It never clicks. It feels dirty, hot, foggy, muddy, just soykaf. Life is just fuarrrking soykaf and everything is shown only to be taken away. I remember when it was not like this and I ahte every second of having to continue living.

I looked into numerology and now I'm always doing math in my head

>>76408 What sorts of Numerology did you get into, Lain? I'm curious, having only read modern pop-occult stuff on "Pythagorean" Numerology.