Question

$3 \frac{11}{28} \div 18 + 100 \div \frac{25}{36} - 5 \frac{1}{6} \div 1 \frac{1}{39}$
решить по действиям​

Answer 1

$\displaystyle \boldsymbol{} \\3 \frac{11}{28} \div 18 + 100 \div \frac{25}{36} - 5 \frac{1}{6} \div 1 \frac{1}{39}=\\\\\\\frac{95}{28}*\frac{1}{18}+100*\frac{36}{25}-\frac{31}{6}*\frac{39}{40}=\boldsymbol{139\frac{761}{5040} } \\\\\\\fbox{1} \ \ \frac{95}{28}*\frac{1}{18}=\frac{95}{504} \\\\\fbox{2} \ \ 100*\frac{36}{25}=4*36 =144\\\\\fbox3 \ \ \frac{31}{6}*\frac{39}{40}=\frac{1209}{240} =\frac{403}{80}$

$\displaystyle \boldsymbol{}\\\\\fbox4 \ \ \frac{95}{504} +\frac{144}{1} =\frac{95}{504}+\frac{72576}{504} =\frac{72671}{504} \\\\\fbox5 \ \ \frac{72671}{504} -\frac{403}{80} =\frac{726710-25389}{5040} =\frac{701321}{5040} =\bf{139\frac{761}{5040}}$

Answer 2

Ответ:

Пошаговое объяснение:

1) 3. 11/28 : 18 = 95/28 : 18 = 95/28 * 1/18 = 95/504

2) 100 : 25/36 = 100 * 36/25 = 4 * 36/1 = 144/1 = 144

3) 5. 1/6 : 1. 1/39 = 31/6 : 40/39 = 31/6 * 39/40 = 31/2 * 13/40 = 403/80 = 5. 3/80

4) 95/504 + 144 = 144. 95/504

5) 144. 95/504 - 5. 3/80 = 144. 950/5040 - 5. 189/5040 = 139. 761/5040