1)138×307=42366
2)42366-41458=908
3)74865:93=805
4)908+805=1713
248÷6=41(ост.2)
652÷9=72 (ост.4)
546÷3=182 (без ост.)
876÷7=125 (ост.1)
835÷4=208 (ост.3)
27: x +405 : 9 =48
27: x +45 =48
27:х = 48-45
27:х=3
х=27:3
х=9
ответ:х=9
Ответ:
Пошаговое объяснение:
(3/7 - 16/21) * 2 1/7 + (11/15 + 0,3) : 12 2/5 = -53/84,
1) 3/7 - 16/21 = 9/21 - 16/21 = -7/21 = -1/3,
2) -1/3 * 2 1/7 = -1/3 * 15/7 = -5/7,
3) 11/15 + 0,3 = 11/15 + 3/10 = 22/30 + 9/30 = 31/30 = 1 1/30,
4) 1 1/30 : 12 2/5 = 31/30 : 62/5 = 31/30 * 5/62 = 1/12,
5) -5/7 + 1/12 = -60/84 + 7/84= -53/84