Question

Efectuati ;
2,(3) + 5,2(4)
15,25 - 7,(5)
18,23 - 5,23 - 1,(2)

Answer 1

Răspuns:

2,(3) + 5,2(4)=

(23-2)/9+(524-52)/90=

¹⁰⁾21/9+472/90=

210/90+472/90=

682/90=7,5(7)

15,25 - 7,(5)=

1525/100-(75-7)/9=

⁹⁾61/4-⁴⁾68/9=

549/36-272/36=

277/36=7,69(4)

18,23 - 5,23 - 1,(2)=

1823/100-523/100-(12-1)/9=

1300/100-11/9=

⁹⁾13-11/9=

117/9-11/9=

106/9=11,(7)