Răspuns:
b. 7584 -999= 7000 -999 + 584
=6001 + 584= 6585
c. 42 865 - 9999= 40 000 - 9999 +2865
= 30 001 + 2865= 32 866
d. 67908- 9999= 60 000 -9 999+ 7908
= 50 001 + 7908= 57 909
e.287 575- 99 999=200 000- 99 999 + 87575
= 100 001 + 87575= 187576
f. 405 359- 99 999= 400 000 - 99 999 + 5359
= 300 001 + 5359= 305 360
