Контрольные задания
Вопрос:

50а. Вычислите: 1) |−7| + |−14|; 2) |3/4| + |−3/4|; 3) |−20| + |−5/6|; 4) |1,7| − |−1/5|; 5) |−6 1/2| + |2 3/4|; 6) 24,4 − |−12| − |−3|; 7) |−3,1| · |−4,1|; 8) |−0,6| · |3 1/3|; 9) |−0,45| : |−0,9|; 10) |−12| : |−3|; 11) (|−5,4| + |1,8|) : |0,4|; 12) 13,2 · (5 − |−2|); 13) 7 1/2 : (|−7| + |−8|).

Фото задания: 50а. Вычислите: 1) |−7| + |−14|; 2) |3/4| + |−3/4|; 3) |−20| + |−5/6|; 4) |1,7| − |−1/5|; 5) |−6 1/2| + |2 3/4|; 6) 24,4 −…Фото задания

Ответ:

  1. \(|-7|+|-14|=7+14=\boxed{21}\).
  2. \(|\frac34|+|-\frac34|=\frac34+\frac34=\boxed{\frac32}\).
  3. \(|-20|+|-\frac56|=20+\frac56=\boxed{20\frac56}\).
  4. \(|1.7|-|-\frac15|=1.7-0.2=\boxed{1.5}\).
  5. \(|-6\frac12|+|2\frac34|=6\frac12+2\frac34=\boxed{9\frac14}\).
  6. \(24.4-|-12|-|-3|=24.4-12-3=\boxed{9.4}\).
  7. \(|-3.1|\cdot|-4.1|=3.1\cdot4.1=\boxed{12.71}\).
  8. \(|-0.6|\cdot|3\frac13|=0.6\cdot\frac{10}{3}=\boxed{2}\).
  9. \(|-0.45|:|-0.9|=0.45:0.9=\boxed{0.5}\).
  10. \(|-12|:|-3|=12:3=\boxed{4}\).
  11. \((|-5.4|+|1.8|):|0.4|=(5.4+1.8):0.4=7.2:0.4=\boxed{18}\).
  12. \(13.2\cdot(5-|-2|)=13.2\cdot(5-2)=13.2\cdot3=\boxed{39.6}\).
  13. \(7\frac12:(|-7|+|-8|)=7.5:(7+8)=7.5:15=\boxed{0.5}\).