所屬主題: [初中數學] – Directed Numbers and Number Line 有向數及數線

Read more

影片內容: 00:24 – multiplication of directed numbers 有向數乘法 03:13 – why is the product of two negative numbers positive 為何負負會得正 07:10 – division of directed numbers 有向數除法 09:41 – illustrative example 例子 10:37 – what if zero is the divisor 除以零怎麼辦 所屬主題: [初中數學] – Directed Numbers and Number Line 有向數及數線

Read more

影片內容: 00:25 – adding / subtracting positive numbers 正數加減 03:33 – adding / subtracting negative numbers 負數加減 08:32 – illustrative example 例子 所屬主題: [初中數學] – Directed Numbers and Number Line 有向數及數線

Read more

影片內容: 00:05 – negative numbers 負數 01:35 – directed numbers 有向數 02:54 – number line 數線 所屬主題: [初中數學] – Directed Numbers and Number Line 有向數及數線

Read more

影片內容: 01:06 – a brief history of negative numbers 負數簡史 所屬主題: [初中數學] – Directed Numbers and Number Line 有向數及數線

Read more