Question

Va rog ajutati-ma!!!! Dau coroana

Answer 1

9.

(85-a)×2=10

85-a=10:2

85-a=5

a=85-5

a=80

(45:b):3=3

45:b=3×3

45:b=9

b=45:9

b=5

(c:7):8=56

c:7=56×8

c:7=448

c=448×7

c=3136

80+5+3136=3221 (suma celor 3 nr.)

13.

Numarul MMCMXL scris cu cifre arabe este 2940

15.

2+6×8=2+48=50

a=50

(50+36:9):9=b

(50+4):9=b

54:9=6

b=6

6×18+9×18-36=c

108+162-36=c

270-36=234

c=234

234:2+222:2-201=d

117+111-201=d

228-201=27

d=27

27:3×2+(81:9+71:1)=e

9×2+(9+71)=e

18+80=98

e=98

98+5×[4+3×(2+16:2)]=f

98+5×[4+3×(2+8)]=f

98+5×[4+3×10]=f

98+5×[4+30]=f

98+5×34=f

98+170=268

f=268

•Sper ca te-am ajutat•