問 數學2條

1. 400g/20kg
= 400g/20(1000)g
= 400/20000
= 0.02
= 2%

2. 450g x 33 1/3%
= 450g x 1/3
= 150g

1)20kg=20000g
400 1
--------- =---------- =2%
20000 50
2)450x33 1/3
=450x100/3
=150x100
=15000kg

2006-10-30 10:20:13 補充：
400/10000=1/50=2%

400/20000
=1/50
=2/100
=2%

450÷33/3/1
=15000

1. Since 400g=0.4kg
0.4kg/20kg=1/50=0.02=2%

2. 450*33又1/33=450*100/3=15000kg

1. 400g是20kg的{白}分之幾??-->百
{400[20(1000)]^-1}100%
=2%
2. 450kg的33又3分1是多少??
450[(33)3+1]3^-1
=1500kg

1. 20kg = 20 x 1000g = 20,000g
400g/20,000g = 1/50


2. 33 + 1/3 = ( 33 x 3 + 1 ) / 3 = 100 /3
450 kg x 100 / 3 = 150 kg x 100
= 15,000 kg

一百分之一

2006-10-28 23:08:37 補充：
一百分之二

1. 400/20000 =1/50

2. 450 x 33 1/3= 15000

1) 百分之二
2)150g