Ответ:

  1. а) \(4.912:16=0.307\), \(18.305:7=2.615\), \(0.0368:4=0.0092\). Тогда \(0.307+(2.615+0.0092)=2.9312\).
  2. б) \(72.492:12=6.041\), \(78.156:36=2.171\), \(120.03:15=8.002\). Тогда \(6.041+2.171-8.002=0.21\).
  3. в) \(1.35:2.7=0.5\), \(0.4:2.5=0.16\), \(4.2-0.075=4.125\). Тогда \(0.5+6.02-5.9+0.16\cdot4.125=1.28\).
  4. г) \(4.3-3.5=0.8\), \(1.44:3.6=0.4\), \(3.6:1.44=2.5\), \(0.1-0.02=0.08\). Тогда \(0.8+0.4+2.5\cdot0.08=1.4\).

Ответ: а) 2,9312; б) 0,21; в) 1,28; г) 1,4.