Răspuns :
A) 1250+5= 1255
B) se inverseaza termenii(adunarea este comutativa) x+y+5=1250+5=1255
C) 3+1250= 1253
D) 1250-3=1247
E) 1250+10=1260
F) x+y ( x+y) = 1250+1250= 2500
a)x+y+5=1250+5=1255
b)x+5+y=1250+5=1255
c)3+x+y=3+1250=1253
d) x-3+y=1250-3=1247
e)x+(y+10)=1250+10=1260
f)x+x+y+y=1250+1250=2500
b)x+5+y=1250+5=1255
c)3+x+y=3+1250=1253
d) x-3+y=1250-3=1247
e)x+(y+10)=1250+10=1260
f)x+x+y+y=1250+1250=2500