Ответ:

  1. \(x+y=1{,}3\cdot10^6+2{,}4\cdot10^4=1\,300\,000+24\,000=1\,324\,000.\)

  2. \(z-y=0{,}02-24\,000=-23\,999{,}98.\)

  3. \(x\cdot y=(1{,}3\cdot2{,}4)\cdot10^{6+4}=3{,}12\cdot10^{10}.\)

  4. \(x:z=(1{,}3:2)\cdot10^{6-(-2)}=0{,}65\cdot10^8=6{,}5\cdot10^7.\)

  5. \(y+z-x=24\,000+0{,}02-1\,300\,000=-1\,275\,999{,}98.\)

  6. \(x\cdot y:z=(3{,}12\cdot10^{10}):(2\cdot10^{-2})=1{,}56\cdot10^{12}.\)

Ответ: 1) 1 324 000; 2) −23 999,98; 3) 3,12 · 10¹⁰; 4) 6,5 · 10⁷; 5) −1 275 999,98; 6) 1,56 · 10¹².