Question

45 1/21 - 28 3/12 ПРОГУ СРОЧНО ПРОШУУУ​

Answer 1

Ответ: $16\frac{67}{84}$.

$45\frac{1}{21} - 28\frac{3}{12} = 45\frac{4}{84} - 28\frac{21}{84} = 44\frac{88}{84} - 28\frac{21}{84} = 16\frac{67}{84}$

Answer 2

$45\frac{1}{21}-28\frac{3}{12}=\frac{45*21+1}{21} -\frac{28*12+3}{12}=\frac{946}{21}-\frac{339}{12}=\frac{946}{21}-\frac{113}{4}=\frac{946*4-113*21}{21*4}=\frac{3784-2373}{84}= \frac{1411}{84}=16\frac{67}{84}$