Question

найдите значение выражений номер 436 1) 5/8+5/6+7/12 2) 1/5+3/8-2/9 3) 1/4+2/9-5/36 4) 3/4+4/5+1/20 5) 3/4+5/12-1/9 6) 4/15+2/5+7/10.​

Answer 1

Ответ:

Пошаговое объяснение:

1) 5/8+5/6+7/12 = (15+20+14)/24 = 49/24 = 2 1/24

2) 1/5+3/8-2/9 = (8+15)/40 - 2/9 = 23/40 - 2/9 = (207-80)/360 = 127/360

3) 1/4+2/9-5/36 = (9+8-5)/36 = 12/36 = 1/3

4) 3/4+4/5+1/20 = (15+16+1)/20 = 32/20 = 1 12/20 = 1 3/5

5) 3/4+5/12-1/9 = (27+15-4)/36 = 38/36 = 1 2/36 = 1 1/18

6) 4/15+2/5+7/10 = (16+24+42)/60 = 82/60 = 1 22/60 = 1 11/30

Answer 2

Ответ:

$1) \frac{5}{8} + \frac{5}{6} +\frac{7}{12} = \frac{15}{24} +\frac{20}{24}+ \frac{14}{24} =\frac{49}{24} = 2\frac{1}{24}$

$2) \frac{1}{5} +\frac{3}{8}- \frac{2}{9} = \frac{8}{40} +\frac{15}{40} -\frac{2}{9} =\frac{23}{40} -\frac{2}{9} =\frac{207}{360}- \frac{80}{360} = \frac{127}{360}$

$3) \frac{1}{4} +\frac{2}{9}- \frac{5}{36} = \frac{9}{36}+ \frac{8}{36}- \frac{5}{36} =\frac{17}{36}- \frac{5}{36} = \frac{12}{36} = \frac{1}{3}$

$4) \frac{3}{4} +\frac{4}{5}+ \frac{1}{20} = \frac{15}{20}+ \frac{16}{20}+ \frac{1}{20} =\frac{31}{20}+ \frac{1}{20} =\frac{32}{20} =1\frac{12}{20} =1\frac{3}{5}$

$5) \frac{3}{4} +\frac{5}{12} -\frac{1}{9} =\frac{27}{36} +\frac{15}{36} -\frac{4}{36} =\frac{42}{36}- \frac{4}{36} =\frac{38}{36} =1\frac{2}{36} =1\frac{1}{18}$

$6) \frac{4}{15}+ \frac{2}{5} +\frac{7}{10} =\frac{8}{30}+ \frac{12}{30} +\frac{21}{30} =\frac{20}{30}+ \frac{21}{30} =\frac{41}{30} =1\frac{11}{30}$