Question

сколько будет 20-2/49​

Answer 1

$20 - \frac{2}{49} = \frac{980 - 2}{49} = \frac{978}{49} = 19 \frac{47}{49}$

Answer 2

$20 - \frac{2}{49} = \frac{20}{1} - \frac{2}{49} = \frac{49 \times 20}{49 \times 1} - \frac{2}{49} = \frac{980}{49} - \frac{2}{49} = \frac{978}{49} = 19 \frac{47}{49}$