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Barbone13
a fost răspuns

2. Calculati: a) 13/8 + 2/8 - 5/8 =
b)2/5 - 3/11 =
c)1/5 + 5/13 - 3/14 =

Răspuns :

EagleEyes
a) 13/8 + 2/8-5/8=(13+2-5)/8= 10/8 =5/4

b) 2/5 - 3/11 = ( 22-15)/55 = 7/55

c) 1/5 + 5/13 - 3/14 = ( 182 +350-195)/910 = 337/910
13/8 + 2/8-5/8 =

= (13 +2 - 5)/8

= 10/8

= 5/4


2/5 - 3/11 =

= (22 - 15)/55

= 7/55


1/5 + 5/13 - 3/14 =

= (182 + 350 - 195)/910

= 337/910