Question

Помогите пожалуйста. Найдите значания выражений(подробно в плане построения ответа): 1.) 3/4 - 1/2; 7/9 - 5/12; -1/4 + 1/5; 3/55 - 21/22; 2.) 3/5 - 7/10; 7/20 - 7/12; 5/12 - 7/8; -2/35 + 11/21; 3.) -1/6 - 5/12; 11/12 - 10/11; -1/6 - 1/15; -1/42 - 2/63.

Answer 1

Ответ:

Если что то не понятно пиши....

Пошаговое объяснение:

1.

3/4 - 1/2 = 3/4 - 2/4 = 1/4

7/9 - 5/12 = 28/36 - 15/36 = 13/36

-1/4 + 1/5 = -5/20 + 4/20 = -1/20 = -0,05

3/55 - 21/22 = 6/110 - 105/110 = -99/110

2.

3/5 - 7/10 = 30/50 - 35/50 = -5/50 = -0,1

7/20 - 7/12 = 21/60 - 35/60 = -14/20 = -0,7

5/12 - 7/8 = 10/24 - 21/24 = -11/24

-2/35 + 11/21 = -6/105 + 55/105 = 49/105

3.

-1/6 - 5/12 = -2/12 - 5/12 = -7/12

11/12 - 10/11 = 121/132 - 120/132 = 1/132

-1/6 - 1/15 = -5/30 - 2/30 = -7/30

-1/42 - 2/63 = -9/378 - 12/378 = -21/378

Answer 2

Пошаговое объяснение:

1.)

$\dfrac{3}{4}-\dfrac{1}{2}=\dfrac{3}{4}-\dfrac{2}{4}=\dfrac{1}{4}$

$\dfrac{7}{9}-\dfrac{5}{12}=\dfrac{28}{36}-\dfrac{15}{36}=\dfrac{13}{36}$

$-\dfrac{1}{4}+\dfrac{1}{5}=-\dfrac{5}{20}+\dfrac{4}{20}=-\dfrac{1}{20}$

$\dfrac{3}{55}-\dfrac{21}{22}=\dfrac{6}{110}-\dfrac{105}{110}=-\dfrac{99}{110}=-\dfrac{9}{10}$

2.)

$\dfrac{3}{5}-\dfrac{7}{10}=\dfrac{6}{10}-\dfrac{7}{10}=-\dfrac{1}{10}$

$\dfrac{7}{20}-\dfrac{7}{12}=\dfrac{21}{60}-\dfrac{35}{60}=-\dfrac{14}{60}=-\dfrac{7}{30}$

$\dfrac{5}{12}-\dfrac{7}{8}=\dfrac{10}{24}-\dfrac{21}{24}=-\dfrac{11}{24}$

$-\dfrac{2}{35}+\dfrac{11}{21}=-\dfrac{6}{105}+\dfrac{55}{105}=\dfrac{49}{105}=\dfrac{7}{15}$

3.)

$-\dfrac{1}{6}-\dfrac{5}{12}=-\dfrac{2}{12}-\dfrac{5}{12}=-\dfrac{7}{12}$

$\dfrac{11}{12}-\dfrac{10}{11}=\dfrac{121}{132}-\dfrac{120}{132}=\dfrac{1}{132}$

$-\dfrac{1}{6}-\dfrac{1}{15}=-\dfrac{5}{30}-\dfrac{2}{30}=-\dfrac{7}{30}$

$-\dfrac{1}{42}-\dfrac{2}{63}=-\dfrac{3}{126}-\dfrac{4}{126}=-\dfrac{7}{126}=-\dfrac{1}{18}$