Question

(5 класс)
$7\frac{4}{15} -2\frac{3}{4}$
и
$9\frac{17}{20} -7\frac{1}{10}$


пж помогите

Answer 1

Пошаговое объяснение:

7 4/15-2 3/4=7 16/60-2 45/60=

=6 60/60+16/60-2 45/60=

=(6-2)+(60/60+16/60-45/60)=

=4 +(60+16-45)/60=4+31/60=4 31/60

9 17/20 -7 1/10=9 17/20-7 2/20=

=(9-7)+(17/20-2/20)=2+15/20=

=2+3/4=2 3/4