Ответ:

  1. \(3452+17324+1548=(3452+1548)+17324=5000+17324=22324\).
  2. \(41+34\cdot23\cdot25=41+34\cdot(23\cdot25)=41+34\cdot575=19591\).
  3. \(54271+39999+10001=54271+(39999+10001)=54271+50000=104271\).
  4. \(56\cdot5+740\cdot3=280+2220=2500\).
  5. \(0{,}835-4{,}05-2{,}835=(0{,}835-2{,}835)-4{,}05=-2-4{,}05=-6{,}05\).
  6. \(14{,}83\cdot50\cdot2\cdot5=14{,}83\cdot(50\cdot2\cdot5)=14{,}83\cdot500=7415\).
  7. \(8{,}438+2{,}55+3{,}15=8{,}438+5{,}7=14{,}138\).
  8. \(3+137+444+873+556+997=(3+997)+(137+873)+(444+556)=1000+1010+1000=3010\).