Hi,
You need to develop 3 calculation skills:
1) Learn how to multiply double-digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJHo).
2) Learn how to work with zeros. The best way - always use 10^power instead of zeros
Example:
300x9000 = 3*10ˆ2 x 9*10ˆ3=3x9*10ˆ(2+3)=27*10ˆ5
Handwritten it looks not that complicated. If you get used to writing all the numbers that way, you will never lose zeros and all multiplications/divisions will be replaced with + or -.
3) Additionally, I suggest to learn how to make the division mentally:
Learn the division table up to 1/11 (i.e. 5/6 = 83.3%). It will help you calculate any percentage problems
Finally, use math tools (Mimir math for iOS, Math tool on Viktor Cheng website) to practice. Train, train, and train again
Good luck!
Great, I think I can reduce the time by practicing. But is it okay to write out the calculation by hand?
of course not necessary (mental the better), but if needed it is fine. In this case I recommend to use another sheet (to leave clean your main page with the structure)
Thank you! I have been recommended that too. I do the easy and medium math exercises in my head, but I struggle to compute the hard questions in the head as there are so many numbers to remember. Do you have a youtube movie that shows how to remember the numbers while calculating?