Question

(3​ 1/4*12-12-23 2/7):5,5

Answer 1

Ответ:

(3 1/4*12-12-23 2/7):5,5=3 1/4•12=(1+3•4/4)•12=13•12/4=156/4=39•4/4=39-12=27-23 2/7=27-23-2/7-23/2/7=4-2/7=4•7/7-2/7=28/7-2/7=28-2/7=26/7=3•7+5/7=3 5/7:5,5=3 5/7:5 5/7:5 5/10=3 5/7:5 1•5/5•5=3 5/7:5 1/2=5+3•7/7:1+5•2/2=26/7:11/2=26/7•2/11=26•2/7•11=52/77