1.
551 + 17 =
4
3
2
568
|
2.
265 + 4 =
4
3
2
269
|
3.
633 + 218 =
2
3
851
4
|
4.
621 – 462 =
2
4
3
159
|
5.
523 – 224 =
4
3
2
299
|
6.
749 – 425 =
2
3
324
4
|
7.
631 + 273 =
2
4
904
3
|
8.
544 – 0 =
4
544
2
3
|
9.
201 + 68 =
269
3
2
4
|
10.
35 – 35 =
3
0
4
2
|
11.
314 – 246 =
4
2
3
68
|
12.
96 – 71 =
2
4
3
25
|
13.
590 + 19 =
3
4
609
2
|
14.
503 – 37 =
2
466
4
3
|
15.
54 + 424 =
2
478
4
3
|
16.
942 – 435 =
4
507
2
3
|
17.
449 + 434 =
883
4
2
3
|
18.
379 + 411 =
790
2
3
4
|
19.
478 – 408 =
4
3
2
70
|
20.
655 – 576 =
3
4
79
2
|
1.
551 + 17 =
4
3
2
568
|
2.
265 + 4 =
4
3
2
269
|
3.
633 + 218 =
2
3
851
4
|
4.
621 – 462 =
2
4
3
159
|
5.
523 – 224 =
4
3
2
299
|
6.
749 – 425 =
2
3
324
4
|
7.
631 + 273 =
2
4
904
3
|
8.
544 – 0 =
4
544
2
3
|
9.
201 + 68 =
269
3
2
4
|
10.
35 – 35 =
3
0
4
2
|
11.
314 – 246 =
4
2
3
68
|
12.
96 – 71 =
2
4
3
25
|
13.
590 + 19 =
3
4
609
2
|
14.
503 – 37 =
2
466
4
3
|
15.
54 + 424 =
2
478
4
3
|
16.
942 – 435 =
4
507
2
3
|
17.
449 + 434 =
883
4
2
3
|
18.
379 + 411 =
790
2
3
4
|
19.
478 – 408 =
4
3
2
70
|
20.
655 – 576 =
3
4
79
2
|