幫我做數!!!!!!

P.1
15. h=9
3. B
4. D

P.2
7a. 16+0+4+0+1=10000+0+100+0+1=10101
7b. 8+2=1000+10=1010
8.唔明 [因為我讀英文- -]
9.737
10.54
11.100101
12.16C
延展題
1.[10進制]=[2進制]=[16進制]
2=10=2
3=11=3
4=100=4
5=101=5
6=110=6
7=111=7
8=1000=8
9=1001 =9
10=1010 =A
11=1011 =B
12=1100 =C
13=1101 =D
14=1110 =E
15=1111=F
16=10000=10
17=10001=11
2a.5B
2b.F75
3a.10011100
3B.1001001101

P.3[開唔到]

P.4

1.x=4+y-----(3)
把(3)代入(1)
4(4+y)+3y=9
16+4y+3y=9
7y=-7
y=-1
x=3

2.
x+y=18-----(1)
x-y=4-------(2)
由(1)取得 x=18-y------(3)
把(3)代入(2)
(18-y)-y=4
18-2y=4
-2y=-14
y=7
x=11
所以 該2個數字為7和11

P.5

9. 闊=3 ,設長為x
2x+2(3)=30
2x+6=30
2x=24
x=12
長=12

10.x+(x+3)+(x+x+3+2)=100
4x+8=100
4x=92
x=23
小亮有$23
小明有23+3=$26
小芬有23+26+2=$51

P.6

10.(1998000-1800000/1800000)x100%=11%
11.888-[888x(1-15%)]=888-754.8=$133.2
12.440/(1-20%)=$550
a.1000000x(1+5%)=1050000
b.1000000x[(1+5%)x4]=4200000
c.4200000x(1-20%)=3360000
賺 (3360000-1000000/1000000)x100%=236%

P.7
甲 , 乙
0 , 4000
0 , 8000
20000 , 20000
20000 , 32000
50000 , 40000
50000 , 60000
120000 , 80000
120000 , 120000
乙,現金回贈不受貸款額限制

開放題
4個組合,($2+$5) 8+16,13+14,18+12

P.1
15.2h=18
h=9
3.A
4.D
P.2
7.(a)10101
(b)1010
8.(a)11110v(2)=1*2^4+1*2^3+1*2^2+1*2^1+0*2^0
(b)4ABv(16)=4*16^2+10*16^1+11
9.2E1v(16)=2*16^2+14*16^1+1=2*256+14*16+1=512+224+1=737
10.110110v(2)=1*2^5+1*2^4+0*2^3+1*2^2+1*2^1+0*2^0=32+16+4+2=54
P.3
I can't open this website. Do you type the website right?
P.4
open question
can't
polynomials
-3x + or- any numbers(except -3x)/
any numbers(except -3x)-3x
1.x-4=y.......(3)
put (3) into(1)
4x+3(x-4)=9
4x+3x-12=9
7x=21
x=3
put x=3 into (3)
3-4=y
-1=y
2.x+y=18......(1)
x-y=4........(2)
x-4=y......(3)
put (3) into (1)
x+x-4=18
2x-4=18
2x=22
x=11
put x=11 into (3)
11-4=y
y=7
P.5
9.2(x+x-3)=30
2(2x-3)=30
4x-6=30
4x=36
x=9
10.x+x+3+x+x+3+2=100
4x+8=100
4x=92
x=23=Leung
Ming=x+3=23+3=26
Fong=x+x+3+2=2x+5=2*23+5=46+5=51
P.6
10.1 998 000-1 800 000/1 800 000*100%=198 000/1 800 000*100%=198/1 800*100%=99/900*100%=11/100*100%=11%
11.888*(1-15%)=888*0.85=754.8
12.440*(1+20%)=440*1.2=528
P.7
find mistake
if x=100, after x add 10%, the value of x is 110, so now the value of x=110, after x minus 10%, the value of x is 99.
open question
$100 000 $0 $4 000
$200 000 $0 $8 000
$500 000 $20 000 $20 000
$800 000 $20 000 $32 000
$1 000 000 $50 000 $40 000
$1 500 000 $50 000 $60 000
$2 000 000 $120 000 $80 000
$3 000 000 $120 000 $120 000
I think bank B is better
$2 $5
3 18
8 16
13 14
18 12




P.1
15. h=9
3. B
4. D

P.2
7a. 16+0+4+0+1=10000+0+100+0+1=10101
7b. 8+2=1000+10=1010
8.唔明 [因為我讀英文- -]
9.737
10.54
11.100101
12.16C
延展題
1.[10進制]=[2進制]=[16進制]
2=10=2
3=11=3
4=100=4
5=101=5
6=110=6
7=111=7
8=1000=8
9=1001 =9
10=1010 =A
11=1011 =B
12=1100 =C
13=1101 =D
14=1110 =E
15=1111=F
16=10000=10
17=10001=11
2a.5B
2b.F75
3a.10011100
3B.1001001101

P.3[開唔到]

P.4

1.x=4+y-----(3)
把(3)代入(1)
4(4+y)+3y=9
16+4y+3y=9
7y=-7
y=-1
x=3

2.
x+y=18-----(1)
x-y=4-------(2)
由(1)取得 x=18-y------(3)
把(3)代入(2)
(18-y)-y=4
18-2y=4
-2y=-14
y=7
x=11
所以 該2個數字為7和11

P.5

9. 闊=3 ,設長為x
2x+2(3)=30
2x+6=30
2x=24
x=12
長=12

10.x+(x+3)+(x+x+3+2)=100
4x+8=100
4x=92
x=23
小亮有$23
小明有23+3=$26
小芬有23+26+2=$51

P.6

10.(1998000-1800000/1800000)x100%=11%
11.888-[888x(1-15%)]=888-754.8=$133.2
12.440/(1-20%)=$550
a.1000000x(1+5%)=1050000
b.1000000x[(1+5%)x4]=4200000
c.4200000x(1-20%)=3360000
賺 (3360000-1000000/1000000)x100%=236%

P.7
甲 , 乙
0 , 4000
0 , 8000
20000 , 20000
20000 , 32000
50000 , 40000
50000 , 60000
120000 , 80000
120000 , 120000
乙,現金回贈不受貸款額限制

P.1
15.2h=18
h=9
3.A
4.D
P.2
7.(a)10101
(b)1010
8.(a)11110v(2)=1*2^4+1*2^3+1*2^2+1*2^1+0*2^0
(b)4ABv(16)=4*16^2+10*16^1+11
9.2E1v(16)=2*16^2+14*16^1+1=2*256+14*16+1=512+224+1=737
10.110110v(2)=1*2^5+1*2^4+0*2^3+1*2^2+1*2^1+0*2^0=32+16+4+2=54
P.3
I can't open this website. Do you type the website right?
P.4
open question
can't
polynomials
-3x + or- any numbers(except -3x)/
any numbers(except -3x)-3x
1.x-4=y.......(3)
put (3) into(1)
4x+3(x-4)=9
4x+3x-12=9
7x=21
x=3
put x=3 into (3)
3-4=y
-1=y
2.x+y=18......(1)
x-y=4........(2)
x-4=y......(3)
put (3) into (1)
x+x-4=18
2x-4=18
2x=22
x=11
put x=11 into (3)
11-4=y
y=7
P.5
9.2(x+x-3)=30
2(2x-3)=30
4x-6=30
4x=36
x=9
10.x+x+3+x+x+3+2=100
4x+8=100
4x=92
x=23=Leung
Ming=x+3=23+3=26
Fong=x+x+3+2=2x+5=2*23+5=46+5=51
P.6
10.1 998 000-1 800 000/1 800 000*100%=198 000/1 800 000*100%=198/1 800*100%=99/900*100%=11/100*100%=11%
11.888*(1-15%)=888*0.85=754.8
12.440*(1+20%)=440*1.2=528
P.7
find mistake
if x=100, after x add 10%, the value of x is 110, so now the value of x=110, after x minus 10%, the value of x is 99.
open question
$100 000 $0 $4 000
$200 000 $0 $8 000
$500 000 $20 000 $20 000
$800 000 $20 000 $32 000
$1 000 000 $50 000 $40 000
$1 500 000 $50 000 $60 000
$2 000 000 $120 000 $80 000
$3 000 000 $120 000 $120 000
I think bank B is better
$2 $5
3 18
8 16
13 14
18 12

2007-08-16 12:21:14 補充：
sor, the correct steps of P.1 15. should be h/1=18/2h=9

2007-08-16 13:28:40 補充：
P.4open question75,86,97