Решение задания 4.234
Выполним вычитание:
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a) -2 \(\frac{5}{8}\) - 1 \(\frac{1}{4}\) = -\(\frac{21}{8}\) - \(\frac{5}{4}\) = -\(\frac{21}{8}\) - \(\frac{10}{8}\) = -\(\frac{31}{8}\) = -3 \(\frac{7}{8}\)
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б) -\(\frac{8}{17}\) - (-\(\frac{3}{17}\)) = -\(\frac{8}{17}\) + \(\frac{3}{17}\) = -\(\frac{5}{17}\)
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в) 1 \(\frac{3}{5}\) - (-\(\frac{21}{6}\)) = \(\frac{8}{5}\) - (-\(\frac{13}{6}\)) = \(\frac{48}{30}\) + \(\frac{65}{30}\) = \(\frac{113}{30}\) = 3 \(\frac{23}{30}\)
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г) -3 \(\frac{7}{12}\) - (-\(\frac{13}{8}\)) = -\(\frac{43}{12}\) + \(\frac{13}{8}\) = -\(\frac{86}{24}\) + \(\frac{39}{24}\) = -\(\frac{47}{24}\) = -1 \(\frac{23}{24}\)
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д) -3 \(\frac{1}{4}\) - 0,75 = -3,25 - 0,75 = -4
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е) -2,4 - (-\(\frac{4}{3}\)) = -2,4 + \(\frac{4}{3}\) = -\(\frac{12}{5}\) + \(\frac{4}{3}\) = -\(\frac{36}{15}\) + \(\frac{20}{15}\) = -\(\frac{16}{15}\) = -1 \(\frac{1}{15}\)
Ответ:
- -3 \(\frac{7}{8}\)
- -\(\frac{5}{17}\)
- 3 \(\frac{23}{30}\)
- -1 \(\frac{23}{24}\)
- -4
- -1 \(\frac{1}{15}\)
Отлично! Ты справился с вычитанием смешанных чисел! Продолжай в том же духе, и у тебя всё получится!