) 10 5/8-27/16=85/8-27/16=2*85/8-27/16= 170/16-27/16=143/16=8 15/16.
2) 5 1/8+14 7/12=41/8+175/12=3*41/8+2*175/12=123/24+350/24=473/24=9 17/24.
3)8 5/9+3 5/6=80/9+23/6=2*80/9+3*23/6=160/18+ +69/18=229/18=12 13/18.
4) 5 2/3+3 1/5=17/3+16/5=5*17/3+3*16/5=85/15+48/15=133/15=8 13/8.
5) 12 5/12-8 7/18=149/12-126/18=3*
*149/12-2*126/18=447/
/36-252/38=195/38=5 5/38.
6) 3 5/16-1/4-1 1/16=53/16-4*1/4-17/16=53/16-4/16-17/16=49/16--17/16=32/16=2.
7) 5 11/12-2 1/6-1 1/4=71/12-2*13/6-3*5/4==71/12-26/12-15/12=45/
/12-15/12=30/12=5/2=2 1/2.
8) 1/8+1 3/5+2 7/8=5*1/8+8*8/5+5*23//8=5/40+64/40+115/40=
=184/40=23/5=4 3/5.
9) 2 7/9-1 5/18+5 1/2=2*25/9-23/18+9*11//2=50/18-23/18+99/18=27/18+99/18=126/18=7.
10) 1/3*2/5=2/15.
11) 1/7*4/7=4/49.
12) 11/12*4/22=1/6.
17) 26*13/34=13*13/17=169/
/17=9 16/17.
18) 12/25*5/16=3/20.
19) 1 3/4*1 3/7=7/4*10/7=5/2=2 1/2
20) 2 2/3*3 3/4=8/3*15/4=10/1=10.
21) 15 7/8*1=15 7/8.
22) 0*12 3/5=0.
23) 2 1/2*4 2/15=5/3*62/15=62/9=6 8/9.
24) (2*5/12+3*3/8)*6/19=(10//24+9/24)*6/19=19/24*
*6/19=1/4 .
25) (3 1/2-2 3/4)*(1 1/6-1/12)=(2*7/2-11/4)*(2**7/6-1/12)=(14/4-11/4)*
*(14/12-1/12)=3/4*13/12=
=13/16.
Пошаговое объяснение:
Выражение: (54/9-(21/3)^2)*81/4*13/20+12*1/3*33/4*11/5-4/17*0*518/19
ответ: -(39471//80)
Решаем по действиям:
1. 54/9=6
54|9_ _
5_4_|6
0
2. 21/3=7
21|3_ _
2_1_|7
0
3. 7^2=49
X7
_7_
49
4. 6-49=-43
-49
_ _6_
-43
5. (-43)*81=-43*81
6. 43*81=3483
X43
_ _8_1_
43
3_4_4_ _
3483
7. 3483/4=870.75
3483|4_ _
3_2_ |870.75
28
2_8_
030
2_8_
20
2_0_
0
8. (-870.75)*13=-870.75*13
9. 870.75*13=11319.75
X870.75
_ _ _ _ _1_3_ _
261225
_8_7_0_7_5_ _ _
11319.75
10. 11319.75/20=(45279//80)
11. 12/3=4
12|3_ _
1_2_|4
0
12. 4*33=132
X33
_ _4_
132
13. 132/4=33
132|4_ _
1_2_ |33
12
1_2_
0
14. 33*11=363
X33
_1_1_
33
3_3_ _
363
15. 363/5=72.6
363|5_ _
3_5_ |72.6
13
1_0_
30
3_0_
0
16. -(45279//80)+72.6=-(39471//80)
17. 4/17=(4//17)
18. (4//17)*0=0
19. 0*518=0
X518
___ ___ ___ ___0___
0
20. 0/19=0
Решаем по шагам:
1. (6-(21/3)^2)*81/4*13/20+12/3*33/4*11/5-4/17*0*518/19
1.1. 54/9=6
54|9_ _
5_4_|6
0
2. (6-7^2)*81/4*13/20+12/3*33/4*11/5-4/17*0*518/19
2.1. 21/3=7
21|3_ _
2_1_|7
0
3. (6-49)*81/4*13/20+12/3*33/4*11/5-4/17*0*518/19
3.1. 7^2=49
X7
_7_
49
4. (-43)*81/4*13/20+12/3*33/4*11/5-4/17*0*518/19
4.1. 6-49=-43
-49
_ _6_
-43
5. (-43*81/4)*13/20+12/3*33/4*11/5-4/17*0*518/19
5.1. (-43)*81=-43*81
6. (-3483/4)*13/20+12/3*33/4*11/5-4/17*0*518/19
6.1. 43*81=3483
X43
_ _8_1_
43
3_4_4_ _
3483
7. (-870.75)*13/20+12/3*33/4*11/5-4/17*0*518/19
7.1. 3483/4=870.75
3483|4_ _
3_2_ |870.75
28
2_8_
030
2_8_
20
2_0_
0
8. -870.75*13/20+12/3*33/4*11/5-4/17*0*518/19
8.1. (-870.75)*13=-870.75*13
9. -11319.75/20+12/3*33/4*11/5-4/17*0*518/19
9.1. 870.75*13=11319.75
X870.75
_ _ _ _ _1_3_ _
261225
_8_7_0_7_5_ _ _
11319.75
10. -(45279//80)+12/3*33/4*11/5-4/17*0*518/19
10.1. 11319.75/20=(45279//80)
11. -(45279//80)+4*33/4*11/5-4/17*0*518/19
11.1. 12/3=4
12|3_ _
1_2_|4
0
12. -(45279//80)+132/4*11/5-4/17*0*518/19
12.1. 4*33=132
X33
_ _4_
132
13. -(45279//80)+33*11/5-4/17*0*518/19
13.1. 132/4=33
132|4_ _
1_2_ |33
12
1_2_
0
14. -(45279//80)+363/5-4/17*0*518/19
14.1. 33*11=363
X33
_1_1_
33
3_3_ _
363
15. -(45279//80)+72.6-4/17*0*518/19
15.1. 363/5=72.6
363|5_ _
3_5_ |72.6
13
1_0_
30
3_0_
0
16. -(39471//80)-4/17*0*518/19
16.1. -(45279//80)+72.6=-(39471//80)
17. -(39471//80)-(4//17)*0*518/19
17.1. 4/17=(4//17)
18. -(39471//80)-0*518/19
18.1. (4//17)*0=0
19. -(39471//80)-0/19
19.1. 0*518=0
X518
___ ___ ___ ___0___
0
20. -(39471//80)
20.1. 0/19=0
Приводим к окончательному ответу с возможной потерей точности:
Окончательный ответ: -493.3875
По действиям:
1. 39471//80=493.3875
39471|8_0_ _
3_2_0_ |493.3875
747
7_2_0_
271
2_4_0_
310
2_4_0_
700
6_4_0_
600
5_6_0_
400
4_0_0_
0
По шагам:
1. -493.3875
1.1. 39471//80=493.3875
39471|8_0_ _
3_2_0_ |493.3875
747
7_2_0_
271
2_4_0_
310
2_4_0_
700
6_4_0_
600
5_6_0_
400
4_0_0_
0
2)450-350=100га-ост
3)100-100%
x-30%
x=100*30/100=30га-кукуруза
4)450-(350+30)=70га-овощи