Răspuns:
a)
435 + 1 = 436
268 + 1 = 269
759 + 1 = 760
570 + 1 = 571
b)
496 - 1 = 495
325 - 1 = 324
600 - 1 = 599
1 000 - 1 = 999
c)
254 - 10 = 244
367 - 10 = 357
853 - 10 = 843
999 - 10 = 989
d)
265 + 100 = 365
756 + 100 = 856
546 + 100 = 646
471 + 100 = 571