A)
3/7 - 5/14 + 3/2
Mmc (7,14,2)= 14
7,14,2: 2
7,7,1: 7
1,1,1
= 2.7
= 14
_______
= (2.3 - 1.5 + 7.3)/14
= (6 - 5 + 21)/14
= (1+21)/14
= 22/14 (:2)/(:2)
= 11/7
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B)
6/5 - 8/9 + 4/15
Mmc (5,9,15)= 45
5,9,15: 3
5,3,5: 3
5,1,5: 5
1,1,1
= 3.3.5
= 9.5
= 45
= (9.6 - 5.8 + 3.4)/45
= (54 - 40 + 12)/45
= (14 + 12)/45
= 26/45
