國一上｜數學1-2《正負數的乘除》8min快速掌握：秒懂「負負得正」的秘密！｜《ten叔叔的數學好輕鬆》

2026 7:49
Synopsis
「負負得正」到底是什麼道理？為什麼「-30 ÷ 5 × 2」不能先算「5 × 2」？ 看到正負數的乘除法，你的大腦也當機了嗎？ 別怕！

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