Пошаговое объяснение:
1)
6,7 + (-5,4) = 6,7 - 5,4 = 1,3
2/5 - 14/25 = 10/25 - 14/25 = -4/25
3,4 - (-12,8) = 3,4 + 12,8 = 16,2
-12/35 * 5/6 = -2/7
-24,84 : (-1,2) = 20,7
4 1/6 : (-3 1/3) = 25/6 : (-10/3) = 25/6 * (-3/10) = -5/4 = -1 1/4
2)
1) -14,2 -(-3,22) = -14,2 + 3,22 = -10,98
2) -10,98 : (-0,8) = 13,725
3) -6 * (-0,7) = 4,2
4) 13,725 + 4,2 = 17,925
ответ: 17,925
3)
a) -6 * 3,7 * (-2,5) * (-4) = -6 * 3,7 * 10 = -6 * 37 = -222
б) -4/5 * 17 + 8 * (-4/5) = -4/5 * (17+8) = -4/5 * 25 = -4*5 = -20
4)
6/11 = 0,(54)
5)
8,6 + x = 5,1
x = 5,1 - 8,6
x = -3,5
Пошаговое объяснение:
1.
1.60/68-32/68+45/68=73/68
1.60/68-32/68+45/68=73/682.
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430a=4.430-680
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430a=4.430-680a=3750
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430a=4.430-680a=37503.
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430a=4.430-680a=37503.6км 561м < 8.223м
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430a=4.430-680a=37503.6км 561м < 8.223м4сут=96 ч
1.60/68-32/68+45/68=73/682.(a+680)-4.360=70a+680=70+4.360a+680=4.430a=4.430-680a=37503.6км 561м < 8.223м4сут=96 ч3т 888 кг < 5.085кг
