Răspuns:
ex1 ) a. 5/9-4/9=1/9
b.11/21-9/21=2/21
c.5/19-1/19=4/19
d. 7/8-6/8=1/8
e.12/7-5/7=7/7
f. 9/16-9/16 =0/16
g. 24/25-6/25=18/25
h. 68/81-51/81=17/81
ex 2 ) a. 25/49-11/49=⁷14/49 =2/7
b. 31/32-15/32=⁸16/32=2/4
c.22/81-13/81=⁹9/81=1/9
d.29/54-13/52=²16/54=8/27
e.27/50-2/50=⁵25/50=5/10
f.23/53-12/53=11/53
g.38/63-10/63=28/63
h.99/100-24/100= ⁵75/100=⁵15/20=3/4
