1.
nn31 + 26 =57 78 + 31 =109n
52 + 29 =81 68 + 76 =144n
154 + 73 =227 268 + 97 = 365n
405 + 263 =668 874 + 198 =1072n
1635 + 594 =2229 4276 + 837 =5113n
3028 + 4736 =7764 5917 + 3809 =9726
2.
nn87 - 21 =66 62 - 34 =28n
150 - 76 =74 864 - 157 =707n
471 - 230 =241 4502 - 623 =3879n
1279 - 154 =1125 8200 - 3561 =4639
3.
nn( 35 + 24 ) * 2 =118 78 - 12 * 3 =78 - 36 = 42n
35 + 24 * 2 = 35 + 48 = 83 ( 78 - 12 ) * 3 = 198n
24 * 5 - 24 * 4 = 24 874 * 2 - 183 = 1565n
45 * 2 + 25 * 2 = 140 6374 - 299 * 3 = 5477