[1.]某數增加70%後是680,求該數.
[2.]某數減少40%後是300,求該數.
[3.]某數減少30%後是 5 6,求該數.
[4.]若25減至15,求百分減少.
[5.]若65減至39,求百分減少.
[6.]60的25%是多少?
[7.]2是5的百分之幾?
[8.]若70減少40%,求減少後的新數值.
[9.]若80增加25%,求增加後的新數值.
[10.]若60減少30%,求減少後的新數值
數學,,f1既
2008-01-03 1:50 am
回答 (7)
2008-01-03 2:25 am
✔ 最佳答案
我的答案 /=除
[1.] 680/(1+70%)
=680/170%
=400
[2.] 300/(1-40%)
=300/60%
=500
[3.] 56/(1-30%)
=56/70%
=80
[4.] (25-15)分之25x100%
=10分之25x100%
=40%
[5.] (65-39)分之65x100%
=26分之65x100%
=40%
[6.] 60x25%
=15
[7.] 2分之5x100%
=40%
[8.] 70x(1-40%)
=70x60%
=42
[9.] 80x(1+25%)
=80x125%
=100
[10.] 60x(1-30%)
=60x70%
=42
I hope I can help you !!!
參考: ME Mind
2009-09-10 12:53 am
好好....
2008-01-03 2:03 am
1. 680/(1+70%)=400
2. 300/(1-40%)=500
3. 56/(1-30%)=80
4. (25-15)/25x100%=40%
5. (65-39)/65x100%=40%
6. 60x25%=15
7. 2/5x100%=40
8. 70x(1-40%)=42
9. 80x(1+25%)=100
10. 60x(1-30%)=42
2. 300/(1-40%)=500
3. 56/(1-30%)=80
4. (25-15)/25x100%=40%
5. (65-39)/65x100%=40%
6. 60x25%=15
7. 2/5x100%=40
8. 70x(1-40%)=42
9. 80x(1+25%)=100
10. 60x(1-30%)=42
參考: me n my calulator
2008-01-03 2:00 am
1. 680/1.7=400
2.300/0.6=500
3. 56/0.7=80
4. 40%
5. 40%
6.60X0.25=15
7.40
8.70x0.6=69.4
9. 80x1.25=00
10.60x 0.7=42
2.300/0.6=500
3. 56/0.7=80
4. 40%
5. 40%
6.60X0.25=15
7.40
8.70x0.6=69.4
9. 80x1.25=00
10.60x 0.7=42
參考: me
2008-01-03 2:00 am
1.400
2.500
3.80
4.-40%(-等於百分減少)
5.-40%
6.15
7.百分之40
8.42
9.100
10.42
2.500
3.80
4.-40%(-等於百分減少)
5.-40%
6.15
7.百分之40
8.42
9.100
10.42
2008-01-03 1:58 am
1.400
2.750
3.80
4.40%
5.40%
6.15
7.40
8.42
9.100
10.42
2008-01-02 21:56:19 補充：
第2條更正係 500
2.750
3.80
4.40%
5.40%
6.15
7.40
8.42
9.100
10.42
2008-01-02 21:56:19 補充：
第2條更正係 500
收錄日期: 2021-04-13 17:58:41
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080102000051KK02725