Question

4 целых -3 целых 3/4

Answer 1

$4 - 3 frac{3}{4} = 3 frac{4}{4} - 3 frac{3}{4} = 3 - 3 + frac{4 - 3}{4} = frac{1}{4}$

Answer 2

$4 - 3 frac{3}{4} = 4 - frac{3 times 4 + 3}{4} = 4 - frac{15}{4} = 3 frac{4}{4} - frac{15}{4} = frac{3 times 4 + 4}{4} - frac{15}{4} = frac{16}{4} - frac{15}{4} = frac{1}{4}$