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снег564
@снег564
August 2021
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помгите это 4 2/3 т.д.
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svetova
(14/3 - 5/9×18/7)/(15/7 + 5/3):5+1=(14/3-5/7)/((45+35)/21)÷5+1=((98-15)/21)/(16/21) + 1=
=(83/21)/(16/21) + 1=83/16+1=99/16
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Mexatronchik
((4 2/3 - 5/9 * 2 4/7)/( 2 1/7 + 1 2/3):5) :0.8*1.25 = 5 1/4
1) 5/9 * 2 4/7 =
5/9 * 18/7 = 10/7 ( 18 и 9 сокращаются)
2)
4 2/3 -
10/7 = 14/3 - 10/7 = 68/21 ( приводим к общему знаменателю)
3)
2 1/7 + 1 2/3 = 15/7 + 5/3 = 80/21
4)80/21 : 5 = 80/21 * 1/5 = 80/105 = 16/21
5) 68/21 : 16/21 = 68/21 * 21/16=68/16 = 34/8=17/4
6)0.8*1.25 = 1
7)
17/4 + 1 = 21/4 = 5 1/4
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Answers & Comments
=(83/21)/(16/21) + 1=83/16+1=99/16
1) 5/9 * 2 4/7 = 5/9 * 18/7 = 10/7 ( 18 и 9 сокращаются)
2)4 2/3 - 10/7 = 14/3 - 10/7 = 68/21 ( приводим к общему знаменателю)
3)2 1/7 + 1 2/3 = 15/7 + 5/3 = 80/21
4)80/21 : 5 = 80/21 * 1/5 = 80/105 = 16/21
5) 68/21 : 16/21 = 68/21 * 21/16=68/16 = 34/8=17/4
6)0.8*1.25 = 1
7) 17/4 + 1 = 21/4 = 5 1/4