Question

выполните вычитание смешанных чисел 9 целых 1/2 - 2 1/4

Answer 1

$9 \frac{1}{2} - 2 \frac{1}{4} = 9 \frac{2}{4} - 2 \frac{1}{4} = 7 \frac{1}{4}$

Answer 2

$9 \frac{1}{2} - 2\frac{1}{4} = \frac{1 + 9*2}{2} - \frac{1 + 2*4}{4} = \frac{19}{2} - \frac{9}{4} =\frac{19*2}{2*2} - \frac{9}{4} = \frac{38}{4} - \frac{9}{4} = \frac{38-9}{4} = \frac{29}{4} = 7 \frac{1}{4}$