=___-(+9)
=??
更新1:
(-7.2)-(+2.3)+(-5)
maths F.1 (20分)
回答 (6)
2008-09-24 1:10 am
✔ 最佳答案
(-2.8)+(+7.8)-(+9)=-2.8+7.8-9
=-4
(-7.2)-(+2.3)+(-5)
=-7.2-2.3-5
=-14.5
2008-09-23 17:11:45 補充：
sorry，根據題目要求，第一條應該係咁
(-2.8)+(+7.8)-(+9)
=-2.8+7.8-9
=5-9
=-4
2008-09-24 1:18 am
(-2.8)+(+7.8)-(+9)
=-2.8+7.8-9
=5-9
=-4
(-7.2)-(+2.3)+(-5)
=-7.2-2.3-5
=-14.5
=-2.8+7.8-9
=5-9
=-4
(-7.2)-(+2.3)+(-5)
=-7.2-2.3-5
=-14.5
2008-09-24 1:12 am
(-2.8)+(+7.8)-(+9)
= ( +5) -(+9)
= -4
(-7.2)-(+2.3)+(-5)
=(- 9.5 )+(-5)
= -14.5
= ( +5) -(+9)
= -4
(-7.2)-(+2.3)+(-5)
=(- 9.5 )+(-5)
= -14.5
2008-09-24 1:11 am
(-2.8)+(+7.8)-(+9)
=5-(+9)
=-4
(-7.2)-(+2.3)+(-5)
=-7.2-2.3-5
=14.5
幫唔幫到你?
=5-(+9)
=-4
(-7.2)-(+2.3)+(-5)
=-7.2-2.3-5
=14.5
幫唔幫到你?
2008-09-24 1:02 am
(-2.8)+(+7.8)-(+9)
=-2.8+7.8-9
=5-9
=-4
=-2.8+7.8-9
=5-9
=-4
收錄日期: 2021-05-03 12:25:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080923000051KK01028