Вопрос:

Выполни действие: 1) 2 7/19 + 6 12/19 =

Выполни действие: 1) 2 7/19 + 6 12/19 =
Фотография

Ответ ассистента

1) $2\frac{7}{19} + 6\frac{12}{19} = 8\frac{19}{19} = 9$ 2) $3 - \frac{5}{8} = 2\frac{8}{8} - \frac{5}{8} = 2\frac{3}{8}$ 3) $2 + \frac{1}{43} = 2\frac{1}{43}$ 4) $12\frac{3}{16} - 2\frac{7}{20} = 12\frac{15}{80} - 2\frac{28}{80} = 11\frac{95}{80} - 2\frac{28}{80} = 9\frac{67}{80}$ 5) $\frac{13}{21} + \frac{10}{21} = \frac{23}{21} = 1\frac{2}{21}$ 6) $7\frac{5}{21} - 4\frac{13}{42} = 7\frac{10}{42} - 4\frac{13}{42} = 6\frac{52}{42} - 4\frac{13}{42} = 2\frac{39}{42} = 2\frac{13}{14}$ 7) $11\frac{5}{12} + \frac{1}{12} = 11\frac{6}{12} = 11\frac{1}{2}$ 8) $\frac{7}{24} + \frac{11}{40} = \frac{35}{120} + \frac{33}{120} = \frac{68}{120} = \frac{17}{30}$ 9) $1 - \frac{12}{25} = \frac{25}{25} - \frac{12}{25} = \frac{13}{25}$ 10) $21\frac{7}{34} - 6\frac{8}{51} = 21\frac{21}{102} - 6\frac{16}{102} = 15\frac{5}{102}$ 11) $4\frac{5}{9} + 2\frac{11}{27} = 4\frac{15}{27} + 2\frac{11}{27} = 6\frac{26}{27}$ 12) $28\frac{9}{25} - 15\frac{5}{8} = 28\frac{72}{200} - 15\frac{125}{200} = 27\frac{272}{200} - 15\frac{125}{200} = 12\frac{147}{200}$

Другие решения

Что ещё задавали пользователи