a.)In a Mathematics competition, there are 10 questions of equal marks. You get 10 marks for a correct answer, lose 8 marks for a wrong answer, or no marks for each blank answer. If Jimmy answered 3 questions correctly, 6 questions wrongly, and left 1 question unanswered, how many marks could he get?
b.)12% of x is 25% of 48, find x.
c.)60% of y is 20% of 150,find y.
過程+答案，thx.
F.1英文數學題
2007-12-27 8:48 pm
回答 (5)
2007-12-27 9:04 pm
✔ 最佳答案
a.)Jimmy could get=3 x 10 - 6 x 8 - 0 x 1
=30 - 48 - 0
= -18
∵Jimmy can get 30 marks for the correct answers and lose 48 marks for the wrong answers
∴Jimmy can't get any marks.
b.)12%x =25% x 48
12%x =12
0.12x =12
x =100
c.)60%y =20% x 150
60%y = 30
0.6y = 30
y = 50
參考: me
2007-12-28 10:07 pm
因為發問者比較prefer peonly2004，所以畀低分少少
2007-12-27 9:22 pm
其實好易姐,不過我只會一條類似b,c的數你參考,because you do it yourself E.g
50% of x is 10% of 100
50% of x = 10% of 100 (其實is的意思是等於)
50% of x = 100 * 10% ( * =乘)
50% of x = 10
50x =10*100
50x =1000
x = 1000/50 ( / =除)
x = 20
50% of x is 10% of 100
50% of x = 10% of 100 (其實is的意思是等於)
50% of x = 100 * 10% ( * =乘)
50% of x = 10
50x =10*100
50x =1000
x = 1000/50 ( / =除)
x = 20
參考: by me
2007-12-27 9:15 pm
a 3*10+6*(-8)+1*0
=30-48+0
=-18(marks)
b x*12%=25%*48
12%x=12
x=12/12%
x=100
c y*60%=20%x*150
60%y=30
y=30/60%
y=50
=30-48+0
=-18(marks)
b x*12%=25%*48
12%x=12
x=12/12%
x=100
c y*60%=20%x*150
60%y=30
y=30/60%
y=50
2007-12-27 9:04 pm
a) 3x10+(-8)x6+0= -18
b) 100
c) 50
b) 100
c) 50
收錄日期: 2021-04-24 00:10:34
原文連結 [永久失效]:
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