17+3
20
20-10
10
2x2
4
10÷2
5
10+100
110
24-6
18
4x5
12÷3
1,234+1,234
2,468
50-25
25
7x7
49
50÷5
129+280
409
780-670
100x100
10,000
210÷ 70
3
73+99
172
3663-444
3,219
9x7
63
42÷ 6
7