Question

Решите плиз ,(20-(0,75+14,3-2,45)/50)/(16,5/55+12,5*4-30,3)

Answer 1

$(20-(0,75+14,3-2,45):50):(16,5:55+12,5cdot4-30,3)=0,9874\ 1.) 0,75+14,3-2,45=12,6\ 2.) 12,6:50=frac{126}{10}:frac{50}{1}=frac{126}{10}:frac{1}{50}=frac{63}{250}=frac{63cdot 4}{250cdot 4}=frac{252}{1000}=0,252\ 3.) 20-0,252=19,748\ 4.) 16,5:55=frac{165}{10}:frac{55}{1}=frac{165}{10}:frac{1}{55}=frac{33}{10}:frac{1}{11}=frac{3}{10}=0,3\ 5.) 12,5cdot 4= frac{125}{10}cdot frac{4}{1}=frac{500}{10}=50\ 6.) 0,3+50=50,3\ 7.) 50,3-30,3=20$

$8.) 19,748:20=frac{19748}{1000}:frac{20}{1}=frac{19748}{1000}:frac{1}{20}=frac{4937}{1000}:frac{1}{5}=frac{4937}{5000}=0,9874$