Question

вычислите 4/5+15/4 ​

Answer 1

(4/5)+(15/4)= 4.55.

Answer 2

$\frac{4}{5} + \frac{15}{4} = \frac{4 \times 4}{20} + \frac{15 \times 5}{20} = \\ = \frac{16}{20} + \frac{75}{20} = \frac{91}{20} = 4 \frac{11}{20}=4.55$

$\frac{4}{25} + \frac{15}{4} = \frac{4 \times 4}{100} + \frac{25 \times 15}{100} = \\ = 0.16 + 3.75 = 3.91$