Question

18 19 20 va rog Urgent dau 20puncte

Answer 1

a)-4-2+3+5-7+9-1=-6+8+2-1=2+1=3
c)40-65+84=-25+84=59
e)16+4-8+9-24=20+1-24=21-24=-3
b)-50+14-7=-36-7=-43
d)17-2+4=15+4=19
f)7-2+4=5+4=9

19
a)-94-17+42-70+82-1=-111-28+21==-139+21=-118
b)-6-2-(-8)+1=-8+8+1=1
c)77-204+245-475-41+242+156=-127-230+201+156=-357+357=0
d)5-[2-(1+2)]-6=5-(2-3)-6=5-(-1)-6=5+1-6=6-6=0
e)-400+245-(185-6100)=-155-185+6100=-340+6100=5760
20
x=4-10-24+15=-6-9=-15 si opusul este 15
b)x=7-3+l-3l-11=4-3-11=1-11=10 si opusul este -10