Question

dau coroana cine o termina primul ​

Answer 1

Răspuns:

a) 2,3·1,5-1,4·2,3+2,3=2,3(1,5-1,4+1)=2,3·1,1=2,53

b) 1,2·10:0,3+3,6·0,1=12:0,3+0,36=40+0,36=10,36

c) 0,7+0,7:0,7-0,7=0,7+1-0,7=1

d) 15,27:0,03+0,834:3=509+0,278=509,278

e) $\frac{1}{2}+\frac{1}{3}*\frac{9}{5}=\frac{5)1}{2}+\frac{2)3}{5} =\frac{5+6}{10}=\frac{11}{10}=1,1$

f) $(\frac{2}{3} )^{2} :(\frac{2}{3} )+(\frac{2017}{2016} )^{0}=\frac{2}{3} +1=\frac{2+3}{3} =\frac{5}{3} =1,(6)$

g) $0,1(6)+\frac{2}{5} =\frac{16-1}{90} +\frac{2}{5}=\frac{15}{90} +\frac{2}{5}=\frac{5)1}{6} +\frac{6)2}{5}=\frac{5+12}{30}=\frac{17}{30}=0,5(6)$

h) $\frac{1}{2} +0,(4)+\frac{5}{12} =\frac{18)1}{2} +\frac{4)4}{9} +\frac{3)5}{12} =\frac{18+16+15}{36} =\frac{49}{36} =1,36(1)$

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