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l2004
@l2004
October 2021
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помогите (2 5/9-1 20/21):1 8/49+1 8/9:6
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prettypushkova
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(2 5/9 - 1 20/21) : 1 8/49 + 1 8/9 : 6 = 5/6
1) 2 5/9 - 1 20/21 = 2 35/63 - 1 60/63 = 1 98/63 - 1 60/63 = 38/63
2) 38/63 : 1 8/49 = 38/63 : 57/49 = 38/63 * 49/57 = (2*7)/(9*3) = 14/27
3) 1 8/9 : 6 = 17/9 * 1/6 = 17/54
4) 14/27 + 17/54 = 28/54 + 17/54 = 45/54 = 5/6
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l2004
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Verified answer
(2 5/9 - 1 20/21) : 1 8/49 + 1 8/9 : 6 = 5/61) 2 5/9 - 1 20/21 = 2 35/63 - 1 60/63 = 1 98/63 - 1 60/63 = 38/63
2) 38/63 : 1 8/49 = 38/63 : 57/49 = 38/63 * 49/57 = (2*7)/(9*3) = 14/27
3) 1 8/9 : 6 = 17/9 * 1/6 = 17/54
4) 14/27 + 17/54 = 28/54 + 17/54 = 45/54 = 5/6