問數學.....幫幫我牙!!(急....)

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1.450*33又3分1%
=450*1/3
=150kg

2=50kg 增加10% 的結果
=50*(1+10%)
=50*1.1
=55kg

3. 由100減至70 的百分數
=(100-70)/100*100%
=30/100*100%
=30%

4.200s減少20%的結果
=200*(1-20%)
=200*0.8
=160s

1.450kg x 33/1/3%
=450kg x 100/3 x 1/100
=450kg x 1/3
=150kg

2.50kg 增加10%
=50kg x (1+10%)
=50kg+50kg x 1/10
=(50+5)kg=55kg

3.100減至70 的百分數
100 x A%=70
A%=70/100
A=70

4. 200s減少20%
=200s x (1-20%)
=200s-200s x 1/5
=(200-40)s=160s

1.450kg*33又3分1%
=150kg
2.50kg*(1+10%)
=55kg
3.(100-70)*100%
=30%
4.200s*(1-20%)
=160s

150
55
70%
160

1. 450kg x 33又3分1%是多小?
450kg x 33又3分1%
=450x1/3
=150
so=150kg
2. 50kg 增加10% 的結果??
50kg+50x10%kg
=50+5
=55
so=55kg
3. 由100減至70 的百分數??
(100-70)/100x100
=30/100%
=30%
so=30%
4. 200s減少20%的結果??
200s-200sx20%
=200s-40s
=160s
so=160s

1. 450kg x 33又3分1%是多小??
ANS:15000kg
2. 50kg 增加10% 的結果??
ANS:55kg
3. 由100減至70 的百分數??
ANS:30%
4. 200s減少20%的結果??
ANS:160s

1. 150kg
2. 50(1+10%)=55kg
3.(100-70)/100*100%=30%
4. 200(1-20%)=160s