2:46:30
※ 他=他枠でもコメントあり / 数字=この枠でのコメント回数
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16:30
for the 9s time tables, when you multiply a number by 9 the numbers in the product add up to 9
他19
16:36
I remember I used to be really competitive at the timed times table sheets so this stuff is ingrained in my head
16:42
I hate seeing dot products and magnitude notation. Goofy letter symbols... That they dont tell you or have a glossary for them...
他22
16:44
If you can do addition, just think of multiplication, a * b, as adding a to itself b number of times
他31






