Question

Eercitiul :2 si 3 va rooog

Answer 1

2. Aducem la numitorul comun 144 =>  amplificam prima fractie cu 6, a doua cu 4, iar a treia cu 3. (30+28-3)/144 = 55/144 3. a = 1/4 = 0,25 b = 3/9 = 1/3 = 0,333... => a<b

Answer 2

$2) \frac{5}{24} + \frac{7}{36} - \frac{1}{48} = \frac{5 \times 6}{24 \times 6} + \frac{7 \times 4}{36 \times 4} - \frac{1 \times 3}{48 \times 3} = \frac{30}{144} + \frac{28}{144} - \frac{3}{144} = \frac{30 + 28 - 3}{144} = \frac{55}{144} \\ \\ 3)a = \frac{1}{4} = \frac{1 \times 25}{4 \times 25} = \frac{25}{100} = 0,25 \\ \\ b = 0,(3) = \frac{3}{9} = \frac{1}{3} = 0,333... \\ \\ a < b$