.
30. Calculați:
a) (21.22.23..... 250):(27)75;
b) (31.32.33.... - 380): (31.33.35. ....3111);
c) (51.53.55.....599):(55.510.515.....5150);
d) (71.76.711.... 7301):(71.74.77.710....: 7154);
e) (41.42.43.....4150):(21.23.25.... 2251);
)
f) (92.94.96.....980):(31. 32. 33. ... - 350).
.