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25. Efectuati Its d) 8 a) 5 -23 2) 6-1 b) 02 15 101 1 1 0 159) 2) 6 - 2 ) ​

25 Efectuati Its D 8 A 5 23 2 61 B 02 15 101 1 1 0 159 2 6 2 class=

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Răspuns:

Explicație pas cu pas:

a)2/5-1/10=(4-1)/10=3/10

b)5/9-1/3=(5-3)/9=2/9

c)3/4-5/8=(3·2-5)/8=1/8

d)1/2-1/3=(3-2)/6=1/6

e)3/4-2/7=(3·7-2·4)/28=(21-8)/28=13/28

f)3/5-3/7=3(7-5)/35=6/35

g)2/9-1/6=(2·2-3)/18=1/18

h)5/12-2/9=(5·3-2·4)/36=7/36

i)7/20-2/15=(3·7-2·4)/60=13/60

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