Addition
10+15
25
78-7
71
2 times 2
4
5 times 2
10
10
10+55
65
62-21
41
2 times 3
6
5 times 5
25
10 times 3
30
60+60
120
86-35
51
2 times 6
12
5 times 7
35
10 times 5
50
150+159
309
1288-1233
55
2 times 10
20
5 times 12
60
10 times 10
100
1299+1211
2510
1299-1199
100
2 times 15_{15 plues 15
30
5 times 14
70
10 times 20
200