Ответ:

  1. 369 + 300 = 669.

  2. 414 + 235 = 649.

  3. 1201 + 498 = 1699.

  4. 731 + 118 = 849.

  5. 917 + 380 = 1297.

  6. 740 + 348 = 1088.

  7. 113 + 97 = 210.

  8. 144 + 146 = 290.

  9. 34 + 63 + 18 = 115.

  10. 48 + 209 + 69 = 326.

  11. 157 + 132 + 105 = 394.

  12. 46 + 547 + 153 = 746.