- 在線時間
- 387 小時
- 最後登錄
- 23-9-23
- 國民生產力
- 1
- 附加生產力
- 5116
- 貢獻生產力
- 0
- 註冊時間
- 11-5-9
- 閱讀權限
- 10
- 帖子
- 439
- 主題
- 3
- 精華
- 0
- 積分
- 5556
- UID
- 742410
 
|
回覆 王家爸爸 的帖子
Agreed. Important to learn the concept. So, I will use within 10 to teach. 10-x =7, x+3=5Also use real life example or sentences. e.g. 5-x=2. A car has 5 seats. A group of people gets in. There are 2 seats left. How many ppl in that group.
|
|
發表於 15-6-3 21:22