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MasterFm
@MasterFm
August 2022
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пж помогиееее!!!!!!!!!!!!!!
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tenneb
1) (-17/5)*(-3/2)*5/17= 3/3 (минус на мину дает плюс, крайние дроби сокращаются)
2) ((-3/2)*8 - (-6)*9/5)*1/2 = (-12 + 6*9/5)*1/2 = -6+3*9/5 = -6+135/5 = -30/5+135/5 = 105/5 = 21
3) ( 38/5 * (-5/2) - 83/20 * (-10) ) * ( 2 - 79/25) = ( -38/2 + 83/10 ) * (50/25-79/25) = (-19+83/10)*(-29/25) = (-190/10+83/10)*(-29/25) = (-107/10)*(-29/25) = 3103/250 = 12,412
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tenneb
Упс. в ответе 1) опечатка. должно быть = 3/2
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Answers & Comments
2) ((-3/2)*8 - (-6)*9/5)*1/2 = (-12 + 6*9/5)*1/2 = -6+3*9/5 = -6+135/5 = -30/5+135/5 = 105/5 = 21
3) ( 38/5 * (-5/2) - 83/20 * (-10) ) * ( 2 - 79/25) = ( -38/2 + 83/10 ) * (50/25-79/25) = (-19+83/10)*(-29/25) = (-190/10+83/10)*(-29/25) = (-107/10)*(-29/25) = 3103/250 = 12,412