Question

1. Stabiliți care dintre comparațiile de mai jos sunt adevărate: @( 1 supra 2 este mai mic ca 3 supra 2; b) 5 supra 7 este mai mare decat 5 supra 4; c) 23 supra 118 este mai mic ca 23 supra 96 ; d) 90 supra 45 = 2 ; 31supra 8 este mai mare ca 49 supra 8; f) 16 supra 4 este mai mare decat 8 supra 2; g) 3 supra 12 este mai mic ca 7 supra 20 ; h) 11 supra 4 este mai mic ca 12 supra 5

Answer 1

$\text{a) }\frac{1}{2}\ \textless \ \frac{3}{2}\leftrightarrow1\ \textless \ 3\text{ (A)}\\\\\text{b) }\frac{5}{7}\ \textgreater \ \frac{5}{4}\leftrightarrow4\cdot5\ \textgreater \ 5\cdot7\leftrightarrow20\ \textgreater \ 35\text{ (F)}\\\\\text{c) }\frac{23}{118}\ \textless \ \frac{23}{96}\leftrightarrow23\cdot96\ \textless \ 23\cdot118\leftrightarrow96\ \textless \ 118\text{ (A)}\\\\\text{d) }\frac{90}{45}=2\leftrightarrow90=45\cdot2\text{ (A)}\\\\\text{e) }\frac{31}{8}\ \textgreater \ \frac{49}{8}\leftrightarrow31\ \textgreater \ 49\text{ (F)}\\\\\text{f) }\frac{16}{4}\ \textgreater \ \frac{8}{2}\leftrightarrow4\ \textgreater \ 4\text{ (F)}$
$\text{g) }\frac{3}{12}\ \textless \ \frac{7}{20}\leftrightarrow20\cdot3\ \textless \ 12\cdot7\leftrightarrow60\ \textless \ 84\text{ (A)}\\\\\text{h) }\frac{11}{4}\ \textless \ \frac{12}{5}\leftrightarrow5\cdot11\ \textless \ 4\cdot12\leftrightarrow55\ \textless \ 48\text{ (F)}$