выполните действие 1) (-2 5/9 + 1 20/21) : 1 8/49 - 1 7/9 : (-6)
МсКсандра:
Чего так удивленно?
Ответы
Ответ дал:
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1. ![-2 \frac{5}{9} + 1 \frac{20}{21}= - \frac{23}{9} + \frac{41}{21}= - \frac{161}{63} + \frac{123}{63}= - \frac{38}{63} -2 \frac{5}{9} + 1 \frac{20}{21}= - \frac{23}{9} + \frac{41}{21}= - \frac{161}{63} + \frac{123}{63}= - \frac{38}{63}](https://tex.z-dn.net/?f=-2+%5Cfrac%7B5%7D%7B9%7D+%2B+1+%5Cfrac%7B20%7D%7B21%7D%3D+-+%5Cfrac%7B23%7D%7B9%7D++%2B++%5Cfrac%7B41%7D%7B21%7D%3D+-+%5Cfrac%7B161%7D%7B63%7D+%2B++%5Cfrac%7B123%7D%7B63%7D%3D+-++%5Cfrac%7B38%7D%7B63%7D++)
2.![- \frac{38}{63}: 1 \frac{8}{49}=- \frac{266}{513} - \frac{38}{63}: 1 \frac{8}{49}=- \frac{266}{513}](https://tex.z-dn.net/?f=-+%5Cfrac%7B38%7D%7B63%7D%3A+1+%5Cfrac%7B8%7D%7B49%7D%3D-++%5Cfrac%7B266%7D%7B513%7D+++)
3.![1 \frac{7}{9} :(-6) = \frac{16}{9}: (-6)= -\frac{16}{54} 1 \frac{7}{9} :(-6) = \frac{16}{9}: (-6)= -\frac{16}{54}](https://tex.z-dn.net/?f=1+%5Cfrac%7B7%7D%7B9%7D+%3A%28-6%29+%3D++%5Cfrac%7B16%7D%7B9%7D%3A+%28-6%29%3D++-%5Cfrac%7B16%7D%7B54%7D++)
4,![-\frac{266}{513}- (- \frac{16}{54}) = - \frac{266}{513}+ \frac{16}{54}= - \frac{532}{1026}+ \frac{304}{1026}= -\frac{228}{1026}= - \frac{114}{513}=- \frac{2}{9} -\frac{266}{513}- (- \frac{16}{54}) = - \frac{266}{513}+ \frac{16}{54}= - \frac{532}{1026}+ \frac{304}{1026}= -\frac{228}{1026}= - \frac{114}{513}=- \frac{2}{9}](https://tex.z-dn.net/?f=+-%5Cfrac%7B266%7D%7B513%7D-+%28-++%5Cfrac%7B16%7D%7B54%7D%29+%3D+-+%5Cfrac%7B266%7D%7B513%7D%2B+++%5Cfrac%7B16%7D%7B54%7D%3D+-+%5Cfrac%7B532%7D%7B1026%7D%2B+%5Cfrac%7B304%7D%7B1026%7D%3D++-%5Cfrac%7B228%7D%7B1026%7D%3D+-+%5Cfrac%7B114%7D%7B513%7D%3D-+%5Cfrac%7B2%7D%7B9%7D+++++)
Ура, я гений!
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Ура, я гений!
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