1. -3-(-7+13)-2分1
2. -6+13-{(-2又5分1)-(-1又2分1)}
3. -{1-(5分4減4分5)}
4. (9-1.8)-(-8.2-11)+(-20)
help me thx 負數９月10日交
2009-09-09 6:56 am
回答 (3)
2009-09-09 7:11 am
✔ 最佳答案
1. -3-(-7+13)-2分1=-3+7-13-0.5
=-9.5//
2. -6+13-{(-2又5分1)-(-1又2分1)}
=-6+13-(-2又5分1+1又2分1)
=-6+13+2.2+1.5
=12.7//
3.-{1-(5分4減4分5)}
=-(1-0.45)
=-1+0.45
=-0.55//
4. (9-1.8)-(-8.2-11)+(-20)
=9-1.8+8.2+11-20
=6.4//
參考: Me
2009-09-09 7:33 am
1. -3-(-7+13)-2分1
= -3-(6)-0.5
= -3-6-0.5
= -9.5(負9.5)
2. -6+13-{(-2又5分1)-(-1又2分1)}
= -6+13-(-2.2)-(-1.5)
= -6+13+2.2+1.5
= 10.7
= -6+13+2.2+1.5
= 10.7
3. -{1-(5分4減4分5)}
= -(1-(0.8-1.25)
= -(1-(-0.45))
= -(1+0.45)
= -1.45(負1.45)
4. (9-1.8)-(-8.2-11)+(-20)
=(7.2)-(-19.2)-20
= 7.2+19.2-20
= 6.4
= -3-(6)-0.5
= -3-6-0.5
= -9.5(負9.5)
2. -6+13-{(-2又5分1)-(-1又2分1)}
= -6+13-(-2.2)-(-1.5)
= -6+13+2.2+1.5
= 10.7
= -6+13+2.2+1.5
= 10.7
3. -{1-(5分4減4分5)}
= -(1-(0.8-1.25)
= -(1-(-0.45))
= -(1+0.45)
= -1.45(負1.45)
4. (9-1.8)-(-8.2-11)+(-20)
=(7.2)-(-19.2)-20
= 7.2+19.2-20
= 6.4
2009-09-09 7:14 am
1. -3+7-13-0.5=-9.5
2. -6+13-(-2.2+1.5)=-6+13+2.2-1.5=7.7
3. -(1-(4/5-5/4)=-(1-(-0.45))=-(1.45)=-1.45
4. 9-1.8+8.2+11-20=6.4
2. -6+13-(-2.2+1.5)=-6+13+2.2-1.5=7.7
3. -(1-(4/5-5/4)=-(1-(-0.45))=-(1.45)=-1.45
4. 9-1.8+8.2+11-20=6.4
收錄日期: 2021-04-13 16:51:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090908000051KK01919