12a - 3a x2 /4
=12a - 6a /4
= 12a - 3a /2
= 21a /2
點解..點解係21a ?
?_? F. 1 MATHS
2007-12-14 6:05 am
回答 (8)
2007-12-14 6:10 am
✔ 最佳答案
因為:12a - 3a/2
= 24a/2 - 3a/2
= (24a - 3a) / 2
= 21a / 2
2007-12-14 6:15 am
12a - 3a x2 /4
=12a-6a/4
=12a-1又a/2
=10.5a
=12a-6a/4
=12a-1又a/2
=10.5a
2007-12-14 6:15 am
12a - 3a / 2
= 24a / 2 - 3a / 2
= ( 24a - 3a ) / 2
= 21a / 2
= 24a / 2 - 3a / 2
= ( 24a - 3a ) / 2
= 21a / 2
2007-12-14 6:12 am
= 12a - 3a /2
=24a/2 - 3a/2 (通分母)
= 21a /2
=24a/2 - 3a/2 (通分母)
= 21a /2
2007-12-14 6:10 am
你錯了,睇步驟
12a - 3a x2 /4
=12a-6a/4
=12a-1又a/2
=10.5a
12a - 3a x2 /4
=12a-6a/4
=12a-1又a/2
=10.5a
收錄日期: 2021-04-13 14:42:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071213000051KK03952