Addition
50 + 6
56
20 - 9
11
Even number greater than 18 but less than 21
20
10 more than 10
20
2 x 5
10
111 + 22
133
56 - 33
23
100 more than 50
150
20 more than 31
51
4 x 3
12
125
67 - 49
18
295, _____, 305, 310, 315
300
10 less than 40
30
10 x 10
100
345 + 299
644
123 - 21
102
3, 6, 9, 12, 15, 18, 21, _____
24
15 more than 25
40
5 x 8
40
1256 + 9657
10, 913
547 - 359
188
Odd number greater than 54 but less than 58 and the digits add up to 10
55
1 less than 1,121
1,120
3 x 8
24