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SVEN [57.7K]
4 years ago
9

1.Вычислите: а) 3,7 · (–5,02); б) –18,605 : (–6,1); в) –5,2 : 0,04. 2. Вычислите рациональным способом: 3. В коробке оказалось 1

2 бракованных лампочек, что составило 4% числа всех лампочек. Сколько целых лампочек было в коробке? 4. Потратили 80% имевшихся денег, и осталось 60 р. Сколько денег было первоначально? 5. Округлив числа а и b с точностью до 0,01, вычислите приближенно сумму а + b и разность а – b, если а = –45,394, b = 23,728. 6. Округлите числа а и b с точностью до двух значащих цифр, вычислите приближенно произведение а·b и частное а:b, если а = 53,74, b = 6,637. Результат округлите с точностью до двух значащих цифр.Контрольная работа №7 7*. Упростите буквенное выражение 3,2 · (x – 5) – 6 · (1,5x – 1) и найдите его значение при x = –0,01.
History
1 answer:
zubka84 [21]4 years ago
7 0

Answer:

???

Explanation:

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