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natasha317
@natasha317
June 2022
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30-28,1:(5 7/20-4 6/35)
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Юлясик2004
Решим пример с дробями по действиям:
30-23,1:(5 7/20 - 4 6/35) = 10,4
1) 5 7/20 - 4 6/35 = 107/20 - 146/35=7×107/140
-4×146/140=749/140 -584/140=165/140=33/28
2) 23,1÷33/28=231/10÷33/28=231×28/10×33=7×14/5×1=98/5
3) 30 - 98/5 = 150/5 - 98/5 =52/5=10 2/5 = 10,4
ОТВЕТ:
30-23,1:(5 7/20 - 4 6/35) = 10 2/5 = 10,4
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Answers & Comments
30-23,1:(5 7/20 - 4 6/35) = 10,4
1) 5 7/20 - 4 6/35 = 107/20 - 146/35=7×107/140 -4×146/140=749/140 -584/140=165/140=33/28
2) 23,1÷33/28=231/10÷33/28=231×28/10×33=7×14/5×1=98/5
3) 30 - 98/5 = 150/5 - 98/5 =52/5=10 2/5 = 10,4
ОТВЕТ: 30-23,1:(5 7/20 - 4 6/35) = 10 2/5 = 10,4