One trick is to round up or down to an easier calculation, and then subtract or add the difference. For example, I got 98 x 6. 100 X 6 is easier, so I did that first. Because I had gone up two to get to 100, I did 6 x 2, and subtracted 12 from 600.
Of course, you could always just do 90 x 6 plus 8 x 6.
this simple multiplication is made easier by taking an indirect route to the answers that arent obvious. for example, I take 48 x 4 and see it as 50 x 4 (which i automatically know is 200) minus 2 x 4 (8) and get the answer 192 in two seconds. But if I multiply 4 by 40 and then 4 by 8 and add them together it takes 2 or 3 times as long.
Weird, I like splitting the tens and ones columns, multiplying those, and adding them back together. Your method would take longer for me. Different minds!
16/20 on this try. I guess it depends a bit on how many easy ones you get too. The ones I didn't have time for were: 24x18, 14x23, 33x17 and 71x8. Yes, the last one of those would've been easy, but didnt spot it when doing others.
If thats your way to recognize me for doing in 1 month, the same quantity of points that you have done in like 2 years, your comment is really welcome.
Looks like we've got a lot of people coming in at around a minute and getting all 20. To me, that sounds like you could lop a minute off the time and still have a fun quiz, but with some time crunch.
Finished all of them with 2:29 left and I'm only 4 years old and have been diagnosed with severe, crippling autism. I'm also a small Indian child in Mumbai with no internet connection.
tough especially since I have memory issue because of my disease (often forget halfway a sentence what I was trying to say, and in the beginning i couldnt read anymore, cause after the second word I had forgotten the first. Reading got like 60% better, still cant focus at all. but math .. I allways get stuck after the first number even with the most basic stuff like 18+5 it took me several minutes sometimes, cause my mind was like a record being stuck, couldnt get past 18+....18+.....18+..... )
so extremely happy I finished this one with 100% the first go !! And actually quite surprised!
I took this test a long time ago and after lots of attempts, I finally got 100% doing it in all in my head in August 23, 2019. Fast forward to May 6 (7) 2020 and I got 100% on my first try with 1 minute left.
Was AFK and almost ran out of time but I came back with 2 mins left and thanks to my quick math skills (high school sucks but it's a valuable lesson) I beat it with 53 seconds left.
Of course, you could always just do 90 x 6 plus 8 x 6.
We should do it better
Do you mean it is easier for you to calculate forty-five times thirteen than to calculate 45 x 13? jk
Who gets better?
Na, just 18/20 xD still first time tough...
Ok say your problem is 92x4. I would take
the first ten and the last one. ( so basically the distributive property,
Ex - 90x4 ( 360 ). Then add the ones. ( 2x4 ) your answer is 368
45*11=45*10+45*1=450+45=495
We need more people like that.
:smirk:
so extremely happy I finished this one with 100% the first go !! And actually quite surprised!
Everybody thinking they above average looks like me is below sad sad
Keep up the good work!