Question

Даю баллов 25!!!!!!!!

Answer 1

1)2

_

5

2)47

__

102

3)191

____

40

4)11

___

12

5)131

____

42

Answer 2

Ответ:

г) 0,4

д) $\frac{13}{102}$

е) 4,775

ё) $\frac{11}{12}$

ж) $3\frac{5}{42}$

Пошаговое объяснение:

г) $(\frac{18}{25}-\frac{17}{100})-\frac{3}{20}=(\frac{18*4}{25*4}-\frac{17}{100})-\frac{3*5}{20*5}=(\frac{72}{100}-\frac{17}{100})-\frac{15}{100}=\frac{72-17-15}{100}=\frac{40}{100}=\frac{4}{10}=0,4$

д) $(\frac{9}{16}-\frac{23}{48})+(\frac{27}{68}-\frac{6}{17})=(\frac{9*3}{16*3}-\frac{23}{48})+(\frac{27}{68}-\frac{6*4}{17*4})=(\frac{27}{48}-\frac{23}{48})+(\frac{27}{68}-\frac{24}{68})=\frac{27-23}{48}+\frac{27-24}{68}=\frac{4}{48}+\frac{3}{68}=\frac{4}{4*12}+\frac{3}{4*17}=\frac{4*17}{4*12*17}+\frac{3*12}{4*12*17}=\frac{68}{4*12*17}+\frac{36}{4*12*17}=\frac{68+36}{4*12*17}=\frac{104}{4*12*17}=\frac{104}{816}=\frac{8*13}{8*102}=\frac{13}{102}$

е) $5-(\frac{11}{20}-\frac{13}{40})=5-(\frac{11*2}{20*2}-\frac{13}{40})=5-(\frac{22}{40}-\frac{13}{40})=5-(\frac{22-13}{40})=5-\frac{9}{40}=4+\frac{40}{40}-\frac{9}{40}=4+\frac{31}{40} =4+\frac{31*25}{40*25}=4+\frac{775}{1000}=4,775$

ё) $8\frac{3}{4}-7\frac{5}{6}=\frac{8*4+3}{4}-\frac{7*6+5}{6}=\frac{35}{4}-\frac{47}{6}=\frac{35*6}{4*6}-\frac{47*4}{6*4}=\frac{210}{24}-\frac{188}{24}=\frac{210-188}{24}=\frac{22}{24}=\frac{11}{12}$

ж) $8-2\frac{13}{14}-1\frac{20}{21}=8-\frac{2*14+13}{14}-\frac{1*21-20}{21}=8-\frac{41}{14}-\frac{41}{21}=8-\frac{41}{7*2}-\frac{41}{7*3}=8-\frac{41*3}{7*2*3}-\frac{41*2}{7*3*2}=8-\frac{41*3+41*2}{7*3*2}=8-\frac{41*5}{42}=8-\frac{205}{42}=\frac{8*42}{42}-\frac{205}{42}=\frac{336}{42}-\frac{205}{42}=\frac{336-205}{42}=\frac{131}{42}=\frac{126+5}{42}=\frac{126}{42}+\frac{5}{42}=3\frac{5}{42}$