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ррцгалгаовдынцзрв
@ррцгалгаовдынцзрв
August 2022
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(7-1 5/12):6,7 + (5,75-3 1/6):15,5
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Answers & Comments
angelina14w
1)) 7 - 1 5/12= 6 12/12- 1 5/12= 5 7/12
2)) 5 7/12: 6,7= 5 7/12: 6 7/10= (12•5+7)/12: (10•6+7)/10= 67/12: 67/10= 67/12• 10/67= 1/6• 5/1= 5/6
(Сократили 67/12 и 10/67; 67 и 67 на 67; 12 и 10 на 2)
3)) 5,75- 3 1/6= 5 3/4- 3 1/6= (4•5+3)/4- (6•3+1)/6= 23/4- 19/6= (23•3)/(4•3) - (19•2)/(6•2)= 69/12- 38/12= 31/12
4) 31/12: 15,5= 31/12: 15 1/2= 31/12: (2•15+1)/2= 31/12: 31/2= 31/12• 2/31= 1/6• 1/1= 1/6
(Сократили 31/12 и 2/31; 31 и 31 на 31; 12 и 2 на 2)
5) 5/6- 1/6= 4/6= (4:2)/(6:2)= 2/3.
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Answers & Comments
2)) 5 7/12: 6,7= 5 7/12: 6 7/10= (12•5+7)/12: (10•6+7)/10= 67/12: 67/10= 67/12• 10/67= 1/6• 5/1= 5/6
(Сократили 67/12 и 10/67; 67 и 67 на 67; 12 и 10 на 2)
3)) 5,75- 3 1/6= 5 3/4- 3 1/6= (4•5+3)/4- (6•3+1)/6= 23/4- 19/6= (23•3)/(4•3) - (19•2)/(6•2)= 69/12- 38/12= 31/12
4) 31/12: 15,5= 31/12: 15 1/2= 31/12: (2•15+1)/2= 31/12: 31/2= 31/12• 2/31= 1/6• 1/1= 1/6
(Сократили 31/12 и 2/31; 31 и 31 на 31; 12 и 2 на 2)
5) 5/6- 1/6= 4/6= (4:2)/(6:2)= 2/3.