Răspuns :
Asta e ceea ce am putut rezolva...
Succes!
La Subiectul 3 am greșit.
6b, nu 8b.
6b= 1024
b= 170
a= 1024-170
a= 846
Succes!
La Subiectul 3 am greșit.
6b, nu 8b.
6b= 1024
b= 170
a= 1024-170
a= 846
1. a=575:5+17·15-200:20
a=115+255-10
a=370-10
a=360
b=4·228-139·0-429
b=912-0-429
b=912-429
b=483
c=486:6-186:6-126:6
c=81-31-21
c=50-21
c=29
b-a:[c+325:(65·5)] 65·5=325
483-360:[29+325:325]
483-360:30 360:30=12
483-12
471
2.
a-b=5
c+d=2
2a-2b+3c+3d=2·5+3·2=10+6=16
2a-2b=2(a-b)
3c+3d=3(c+d)
3.
a-b=1034
a:b=7, r=8 =>a=7b+8
--------------------------------
7b+8-b=1034
6b+8=1034
6b=1034-8
6b=1026
b=1026/6
b=171
a-b=1034=>a-171=1034
a=1034+171
a=1205
V:1205:171=6, r=8
4. L=120m
l=L/2
l=120/2
l=60m
P=2L+2l
P=2·120+2·60
P=240+120
P=360m-lungimea gardului
Sper ca te-am ajutat..
a=115+255-10
a=370-10
a=360
b=4·228-139·0-429
b=912-0-429
b=912-429
b=483
c=486:6-186:6-126:6
c=81-31-21
c=50-21
c=29
b-a:[c+325:(65·5)] 65·5=325
483-360:[29+325:325]
483-360:30 360:30=12
483-12
471
2.
a-b=5
c+d=2
2a-2b+3c+3d=2·5+3·2=10+6=16
2a-2b=2(a-b)
3c+3d=3(c+d)
3.
a-b=1034
a:b=7, r=8 =>a=7b+8
--------------------------------
7b+8-b=1034
6b+8=1034
6b=1034-8
6b=1026
b=1026/6
b=171
a-b=1034=>a-171=1034
a=1034+171
a=1205
V:1205:171=6, r=8
4. L=120m
l=L/2
l=120/2
l=60m
P=2L+2l
P=2·120+2·60
P=240+120
P=360m-lungimea gardului
Sper ca te-am ajutat..