1. 159 . ., 139,7 . ., 87,6 . ., 7,8 . ., ?
.
= (./ . )*100%
= + = 87,6 + 7,8 = 95,4
= (7,8/95,4)*100% = 8,17%
2. 100 . ., 75 . ., 60 . ., 11%,
.
=( / )*100%
= ( * .)/100%=0,11*60=6,6 .
= +
= . = 60 6,6 = 53,4
3. 12 . ., 8%,
.
= ( / )*100%
= +
8% = (12/ + )*100% = (12/(+12))*100%
= 138
4. 95 . ., 85 . ., 25 . ., 9%, ?
.
=( / )*100%
= +
= = 85 25 = 60
= 9% = (/60)*100%
= 0,09*60 = 5,4 .
5. : 0?
.
. , , ( ). , , , . 6-7%
6. , ?
.
, , .
7. ?
.
, . .
|
|
8. 5%, 4 . ., 3 . ., 2,8 . ., ?
.
= (- U/ - L)*100%
U=U.+U.+U.=4+3+2,8=9,8 .
=((U+U)/L)*100%
L=((U+U)/ .)*100%=140 .
= (9,8/140)*100%=7%
9. 175 . ., 6%, 9%, 3 . ., 4,5 . , ?
.
u = u u = 9% - 6% = 3%
(U- - , u )
u = (U /L)*100%
L=(U/u )*100% = 4,5/0,03=150 .
u = (U/L)*100%=(3/150)*100%=2%
u = u +u
u = 6% - 2% = 4%
10. 300 . ., 250 . ., 7 . ., 8 . ., 10 . .., 175 . . 1770 . ., 2000 . .,
.
:
(( )/ ) *100%= -k(u u )
u = (U/L)*100%
u = (U/L)*100%
u = (U/L)*100%
u = u + u
u =u + u
L ( .) =E+U= +
U=U +U +U = 7+8+10= 25 .
L=175+25=200 .
u . = (7/200)*100%=3,5%
u = (10/200)*100%=5%
u = (8/200)*100%=4%
u = 3,5+4=7,5%
u = 7,5+5=12%
( )/ = -k(u u )
((2000-1770)/2000)*100%= - k(12,5-7,5)
K= 0,115/0,05 = 2,3
11. 6,5%. 5%, 2. 2550 . . ( %) , .
.
(( )/ )*100% = -k(u u )
-
(( )/ )*100% = - 2*(6,5-5)= -3
(( 2550)/2550))*100% = -k(u u )
(( 2550)/2550))*100% = -k(0,065 0,05)
= 2473.5 .
= = 2550 2473,5 = -76,5
13. 1200 . 1248 ., 7%, ?
.
. = / = 1248/1200 = 1,04
= (100%+7%)/100%=1,07
= ( ./)*100%=(1,04/1,07)*100%=97%
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, 3% (100% - 97%)
: 12-13 5 ;
10-11 4 ;
7-9 3 ;
4-6 2 ;
4- 0 .