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Анжи195
@Анжи195
July 2021
1
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Примите свойства деления для вычесления значений следующих выражений:
1)(-0,45*0,71):(-0,9)
2)-190:(1,9*25)
3)(-9/28)*(-15 целых 5/9):5
4)(4/5-5/6+2/15);(-1/30)
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anna019010
1) (-0,45*0,71) : ( -0,9) = (-45/100 * 71/100) : (-9/10) = (-3195/10000) : (-9/10) = (-3195/10000) * (-10/9) = 355/1000 = 0,355
2) -190 : (1,9 * 25) = -190/1 : (19/10 * 25/1) = -190/1 : 95/2 = -190 * 2/95 = -4
3) (-9/28) * (-15 5/9 ) : 5 = (-9/28 ) * (-140/9) : 5 = 5 : 5 = 1
4) (4/5 - 5/6 + 2/15) : (-1/30) = (24-25+4)/30 = 3/30 * (-30/1) = -3
2 votes
Thanks 2
Анжи195
спасибо огромное!!!
anna019010
пожалуйста
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Answers & Comments
2) -190 : (1,9 * 25) = -190/1 : (19/10 * 25/1) = -190/1 : 95/2 = -190 * 2/95 = -4
3) (-9/28) * (-15 5/9 ) : 5 = (-9/28 ) * (-140/9) : 5 = 5 : 5 = 1
4) (4/5 - 5/6 + 2/15) : (-1/30) = (24-25+4)/30 = 3/30 * (-30/1) = -3