Краткий ответ:
- \(\frac{17}{60}\);
- \(\frac{11}{96}\);
- \(1\frac{1}{28}\);
- \(\frac{11}{180}\);
- \(5\frac{6}{25}\);
- \(2\frac{7}{16}\);
- \(5\frac{3}{16}\);
- \(4\frac{1}{11}\).
Ключевые шаги
Правило: дроби сначала приводим к общему знаменателю.
\[ \frac{3}{20}+\frac{2}{15} =\frac{9}{60}+\frac{8}{60} =\frac{17}{60}. \]
\[ \frac{17}{32}-\frac{5}{12} =\frac{51}{96}-\frac{40}{96} =\frac{11}{96}. \]
\[ \frac{11}{28}+\frac{9}{14} =\frac{11}{28}+\frac{18}{28} =\frac{29}{28} =1\frac{1}{28}. \]
\[ \frac{35}{36}-\frac{41}{45} =\frac{175}{180}-\frac{164}{180} =\frac{11}{180}. \]
Приведём \(\frac25\) к знаменателю \(25\): \[ 3\frac{21}{25}+1\frac25 =3+1+\frac{21}{25}+\frac{10}{25} =4+\frac{31}{25} =5\frac{6}{25}. \]
\(\frac38=\frac6{16}\): \[ 4\frac{13}{16}-2\frac38 =4\frac{13}{16}-2\frac6{16} =2\frac7{16}. \]
\(\frac56=\frac{40}{48}\): \[ 5\frac56-\frac{31}{48} =5\frac{40}{48}-\frac{31}{48} =5\frac9{48} =5\frac3{16}. \]
\(\frac47=\frac{44}{77}\): \[ 6\frac47-2\frac{37}{77} =6\frac{44}{77}-2\frac{37}{77} =4\frac7{77} =4\frac1{11}. \]
Проверка, например: \[ 5\frac6{25}-1\frac25=3\frac{21}{25}, \] \[ 4\frac1{11}+2\frac{37}{77} =4\frac7{77}+2\frac{37}{77} =6\frac{44}{77}=6\frac47. \]
