Question

Помогите пожалуйста я не хочу потратить 13 баллов на просто так SOS

Answer 1

Ответ:

1

а) 5/9+1/9=6/9=2/3

б) 7/11+2/11=10/11

в) 121/227-101/227=20/227

г) 9/16-7/16=2/16=1/8

д) 5/14-1/14=4/14=2/7

е) 98/103-18/103=80/103

2

а) х+2/9=5/9

   х=5/9-2/9

    х=3/9

б) х-7/11=2/11

х=2/11+7/11

х=9/11

Пошаговое объяснение:

Answer 2

1)

$\frac{5}{9}+\frac{1}{9}=\frac{5+1}{9}=\frac{6}{9}=\frac{6:3}{9:3} =\frac{2}{3} \\\\\frac{7}{11}+\frac{2}{11}=\frac{7+2}{11}=\frac{9}{11}\\\\\frac{121}{227}+\frac{101}{227}=\frac{121+101}{227}=\frac{222}{227}\\\\\frac{9}{16}-\frac{7}{16}=\frac{9-7}{16}=\frac{2}{16}=\frac{2:2}{16:2} =\frac{1}{8}\\\\\frac{5}{14}-\frac{1}{14}=\frac{5-1}{14}=\frac{4}{14}=\frac{4:2}{14:2} =\frac{2}{7}\\\\\frac{98}{103}8\frac{18}{103}=\frac{98-18}{103}=\frac{80}{103}$

2)

$x+\frac{2}{9}=\frac{5}{9} \\\\x=\frac{5}{9}-\frac{2}{9} \\\\x=\frac{3}{9}\\\\x=\frac{1}{3}$

Проверка:

$\frac{1}{3} +\frac{2}{9}=\frac{5}{9} \\\\\frac{3}{9} +\frac{2}{9}=\frac{5}{9}\\\\\frac{3+2}{9}=\frac{5}{9}\\\\\frac{5}{9}=\frac{5}{9}$

------------------

$x-\frac{7}{11}=\frac{2}{11}\\\\x=\frac{2}{11}+\frac{7}{11}\\\\x=\frac{9}{11}$

Проверка:

$\frac{9}{11} -\frac{7}{11}=\frac{2}{11}\\\\\frac{9-7}{11}=\frac{2}{11}\\\\\frac{2}{1}=\frac{2}{1}$