Using every one of the digits 1-9 only once,using only 3-digit numbers.I made an addition and could find:



 1.  124 + 659 = 783
 2.  125 + 739 = 864
 3.  127 + 359 = 486
 4.  127 + 368 = 495
 5.  128 + 367 = 495
 6.  128 + 439 = 567
 7.  129 + 357 = 486
 8.  129 + 438 = 567
 9.  129 + 654 = 783
10.  129 + 735 = 864
11.  134 + 658 = 792
12.  135 + 729 = 864
13.  138 + 429 = 567
14.  138 + 654 = 792
15.  139 + 428 = 567
16.  139 + 725 = 864
17.  142 + 596 = 738
18.  142 + 695 = 837
19.  143 + 586 = 729
20.  145 + 692 = 837
21.  146 + 583 = 729
22.  146 + 592 = 738
23.  152 + 487 = 639
24.  152 + 784 = 936
25.  154 + 629 = 783
26.  154 + 638 = 792
27.  154 + 782 = 936
28.  157 + 329 = 486
29.  157 + 482 = 639
30.  158 + 634 = 792
31.  159 + 327 = 486
32.  159 + 624 = 783
33.  162 + 387 = 549
34.  162 + 783 = 945
35.  163 + 782 = 945
36.  167 + 328 = 495
37.  167 + 382 = 549
38.  168 + 327 = 495
39.  173 + 286 = 459
40.  173 + 295 = 468
41.  175 + 293 = 468
42.  176 + 283 = 459
43.  182 + 367 = 549
44.  182 + 394 = 576
45.  182 + 457 = 639
46.  182 + 493 = 675
47.  182 + 754 = 936
48.  182 + 763 = 945
49.  183 + 276 = 459
50.  183 + 492 = 675
51.  183 + 546 = 729
52.  183 + 762 = 945
53.  184 + 392 = 576
54.  184 + 752 = 936
55.  186 + 273 = 459
56.  186 + 543 = 729
57.  187 + 362 = 549
58.  187 + 452 = 639
59.  192 + 384 = 576
60.  192 + 483 = 675
61.  192 + 546 = 738
62.  192 + 645 = 837
63.  193 + 275 = 468
64.  193 + 482 = 675
65.  194 + 382 = 576
66.  195 + 273 = 468
67.  195 + 642 = 837
68.  196 + 542 = 738
69.  214 + 569 = 783
70.  214 + 659 = 873
71.  215 + 478 = 693
72.  215 + 748 = 963
73.  216 + 378 = 594
74.  216 + 738 = 954
75.  218 + 349 = 567
76.  218 + 376 = 594
77.  218 + 439 = 657
78.  218 + 475 = 693
79.  218 + 736 = 954
80.  218 + 745 = 963
81.  219 + 348 = 567
82.  219 + 438 = 657
83.  219 + 564 = 783
84.  219 + 654 = 873
85.  234 + 657 = 891
86.  235 + 746 = 981
87.  236 + 718 = 954
88.  236 + 745 = 981
89.  237 + 654 = 891
90.  238 + 419 = 657
91.  238 + 716 = 954
92.  239 + 418 = 657
93.  241 + 596 = 837
94.  243 + 576 = 819
95.  243 + 675 = 918
96.  245 + 673 = 918
97.  245 + 718 = 963
98.  245 + 736 = 981
99.  246 + 573 = 819
100.  246 + 591 = 837
101.  246 + 735 = 981
102.  248 + 319 = 567
103.  248 + 715 = 963
104.  249 + 318 = 567
105.  251 + 397 = 648
106.  254 + 619 = 873
107.  254 + 637 = 891
108.  257 + 391 = 648
109.  257 + 634 = 891
110.  259 + 614 = 873
111.  264 + 519 = 783
112.  269 + 514 = 783
113.  271 + 593 = 864
114.  271 + 683 = 954
115.  273 + 546 = 819
116.  273 + 591 = 864
117.  273 + 645 = 918
118.  273 + 681 = 954
119.  275 + 418 = 693
120.  275 + 643 = 918
121.  276 + 318 = 594
122.  276 + 543 = 819
123.  278 + 316 = 594
124.  278 + 415 = 693
125.  281 + 394 = 675
126.  281 + 673 = 954
127.  283 + 671 = 954
128.  284 + 391 = 675
129.  291 + 357 = 648
130.  291 + 384 = 675
131.  291 + 546 = 837
132.  291 + 573 = 864
133.  293 + 571 = 864
134.  294 + 381 = 675
135.  296 + 541 = 837
136.  297 + 351 = 648
137.  314 + 658 = 972
138.  317 + 529 = 846
139.  317 + 628 = 945
140.  318 + 627 = 945
141.  318 + 654 = 972
142.  319 + 527 = 846
143.  324 + 567 = 891
144.  324 + 657 = 981
145.  327 + 519 = 846
146.  327 + 564 = 891
147.  327 + 618 = 945
148.  327 + 654 = 981
149.  328 + 617 = 945
150.  329 + 517 = 846
151.  341 + 586 = 927
152.  342 + 576 = 918
153.  346 + 572 = 918
154.  346 + 581 = 927
155.  352 + 467 = 819
156.  354 + 618 = 972
157.  354 + 627 = 981
158.  357 + 462 = 819
159.  357 + 624 = 981
160.  358 + 614 = 972
161.  362 + 457 = 819
162.  364 + 527 = 891
163.  367 + 452 = 819
164.  367 + 524 = 891
165.  372 + 546 = 918
166.  376 + 542 = 918
167.  381 + 546 = 927
168.  386 + 541 = 927

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