Question

exercitiul 8 URGENT DAU COROANA
Va rog

Answer 1

a)1/2-1/7=7/14-2/14=5/14
b)2/3-1/4=8/12-3/12=5/12
c)5/4-1/2=5/4-2/4=3/4
d)5/6-1/3=5/6-2/6=3/6=1/2
e)7/2-1/5=35/10-2/10=33/10
f)1-2/5=5/5-2/5=3/5
g)2/5-1/2=4/10-5/10=-1/10
h)11/4-3/2=11/4-6/4=5/4
i)7/6-3/4=14/12-9/12=5/12
j)11/12-5/18=33/36-10/36=23/36
k)13/20-7/30=39/60-14/60=25/60=5/12
l)37/45-17/30=74/90-51/90=23/90
operatia de adunare sau scadere la fractii se face numai dupa ce aduci fractiile la acelasi numitor