【因数分解】知らないと損する時短テクニックがヤバすぎた
3:43
Seriously, even a junior high school student can solve this in 30 seconds? Tips for Figure Problems
17:17
Be a “prime number god” by holding the pattern! Winning at integer problems
17:58
Revolutionize your lifetime of calculations in just 15 minutes [Indian style calculations
1:01:22
【受験生必見】数学力をグっと高めるたった1時間の授業
21:25
I also got the answers to the first grade math test wrong, the factoring was too bad.
21:33
How to derive the sum-product formula “in an instant” is explained from scratch.
10:59
【視聴者からの裏技】３変数交代式の因数分解
19:24