Question

As dori rezolvarea acestui exercițiu va rog!

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2,1+5,4=7,5

b) 1,5+1,(5)=15/10+14/9=15*9/90+14*10/90=135+140/90=275/90=55/18

c) 23,4-53,4= -30

d) (42-4)/90-35/10=38/90-35*9/90=(38-315)/90=287/90

e) 2,5+1,(3)=25/10+12/9=25*9/90+12*10/90=(225+120)/90=345/90=69/18=

23/6

f)7,9-3,5=4,4

g)23,41+0,77=24,18

h) 2,71-4,05=-1,34

i) 3,5-1,25+0,(3)+1,(6)=1,25+1,(9)=125/100+18/9=125*9/900+18*100/900=

(1125+1800)/900=2925/900=117/36=13/4

j)1,400+3,250-8,903=-4,253

k)0,240+2,243-1,500=0,983

l)39,500+17,330-100,888=-44,058