音が流れない場合、再生を一時停止してもう一度再生してみて下さい。
ツール 
画像
Brilliant.org
110549回再生
Arithmetic Tricks - solve tedious math problems in no time

Ever wondered how some people can solve seemingly complex math problems in seconds? Learn their shortcuts, then try it out at brilliant.org/arithmetictricks.

Subscribe for weekly math and science videos that'll explore challenging problems, common misconceptions, and intriguing concepts.

FIND US ON:
Website: brilliant.org/
Twitter: twitter.com/brilliantorg/
Instagram: www.instagram.com/brilliantorg/
Facebook - Math: facebook.com/math.brilliant.org
Facebook - Science: facebook.com/math.brilliant.org

コメント