- 3 1/7 * (-8) - 2,9 : 0,1 + 11/21 : (-3 2/3) = - 4
1) - 3 1/7 * (-8) = 22/7 * 8 = 176/7 = 25 1/7
2) 2,9 : 0,1 = 29
3) 11/21 : (-3 2/3) = 11/21 : (-11/3) = 11/21 * (-3/11) = - 3/21 = - 1/7
4) 25 1/7 - 29 = - 3 6/7
5) - 3 6/7 + (-1/7) = - 3 6/7 - 1/7 = - 3 7/7 = - 4
Пояснения:
3 целых 1/7 = (3*7+1)/7 = 22/7
(-) * (-) = (+)
3 целых 2/3 = (3*3+2)/3 = 11/3
3/21 = 1/7 - сократили на 3
(+) : (-) = (-)
67:5=50:5(ост. 17)=10+17:5=13(ост.2)
79:8=72:8(ост.7)=9(ост.7)
97:10=90:10(ост.7)=9(ост.7)
39:5=35:5(ост.4)=7(ост.4)
5) 37:9=4(ост.1)
6) 77:14=5(ост.7)
7) 8866:43=206(ост.8)
<span>8) 159420:910=175(ост.170)</span>
X=467•2
x=934
x=999-934
x=65
ответ:x=65