1:
6228 + 2135 =
2:
3661 + 1229 =
3:
2341 + 678 =
4:
1456 - 785 =
5:
2521 - 987 =
6:
3451 - 2341 =
7:
12 × 6 =
8:
7 × 7 =
9:
5 × 13 =
10:
100 ÷ 2 =
11:
56 ÷ 7 =
12:
48 ÷ 4 =
13:
2561 + 714 =
14:
2561 + 972 =
15:
961 + 552 =
16:
1350 - 520 =
17:
3456 - 2219 =
18:
2345 - 789 =
19:
12 × 3 =
20:
20 × 4 =
21:
100 × 10 =
22:
1000 ÷ 100 =
23:
21 ÷ 3 =
24:
70 ÷ 5 =
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