Пошаговое объяснение:
№5
а) 0,7а * (-0,8в) = -(0,7 * 0,8) * а * в = -056ав
б) 7/18с * (-4d) * (-3/28m) = (7/18 * 4 * 3/28) * c * d * m = (7*4*3)/(18*28) * c * d * m = 84/504cdm = 1/6cdm
№6
a)
18 * 15 2/9 - 15 2/9 * 17 = 15 2/9 * (18 - 17) =
15 2/9 * 1 = 15 2/9
б)
2 6/7 * (-0,2) * 7/20 * (-25) =
(2 6/7 * 7/20) * (-0,2 * (-25)) =
(20/7 * 7/20) * 5 = 1 * 5 = 5
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Verified answer
Пошаговое объяснение:
№5
а) 0,7а * (-0,8в) = -(0,7 * 0,8) * а * в = -056ав
б) 7/18с * (-4d) * (-3/28m) = (7/18 * 4 * 3/28) * c * d * m = (7*4*3)/(18*28) * c * d * m = 84/504cdm = 1/6cdm
№6
a)
18 * 15 2/9 - 15 2/9 * 17 = 15 2/9 * (18 - 17) =
15 2/9 * 1 = 15 2/9
б)
2 6/7 * (-0,2) * 7/20 * (-25) =
(2 6/7 * 7/20) * (-0,2 * (-25)) =
(20/7 * 7/20) * 5 = 1 * 5 = 5