Ответы на вопрос:
1) -5 × 49 × 4 = (-5 × 4) × 49 = -20 × 49 = -980.
2) 3 1/8 (-y + 8) - 4 5/8 (y - 16) = ((3 1/8 × (-y)) + (3 1/8 × 8)) - ((4 5/8 × y) + (-4 5/8 × 16)) = (3 1/8 y + 25/8 × 8) - (4 5/8 y - 37/8 × 16) = 3 1/8 y + 25 - 4 5/8 y - 74
= -1 1/2 - 49 = -1 1/2 - 48 2/2 = - (1 1/2 + 48 2/2) = - 49 3/2 = -50 1/2.
3) 0,8 × (-125) × 0,5 × (-2) = -100 × (-1) = 100.
4) -3,73 × 50 × (-2) × (-0,01) = (50 × (-2) × (-0,01)) × (-3,73) = 1 × (-3,73) = -3,73.
5) 7/8 × (-4,5) × (-1 1/7) × 0,4 = 7/8 × 9/2 × 8/7 × 2/5 = 7 × 9 × 8 × 2/8 × 2 × 7 × 5 = 1 × 9 × 1 × 1/1 × 1 × 1 × 5 = 9/7 = 1 2/7.
6) -4/9 × (-3/11) × 9,16 × (-22) = - (4/9 × 3/11 × 22) × 9,16 = -8/3 × 9 4/25 = -1832/75 = -24 32/75.
ответ: 1) -980;
2) -50 1/2;
3) 100;
4) -3,73;
5) 1 2/7;
6) -24 32/75.
____________
Удачи Вам всегда и во всём! :)
Популярно: Математика
-
daaler19.05.2020 23:29
-
безумнаявкедах29.01.2021 08:20
-
ssssss2202.09.2021 12:58
-
karakushan19.06.2022 17:03
-
EvaPark201330.06.2022 17:50
-
TAISKAKISKA21.11.2021 18:27
-
MadMax2227702.02.2021 14:39
-
tzar108.10.2021 15:49
-
nekish2110.04.2021 04:55
-
Kakation28.05.2022 19:00