Addition within 20
3+2
What is 5
6-3
What is 3
10+10
What is 20
20-10
What is 10
37+10
What is 47
9+3
What is 12
8-6
What is 2
20+20
What is 40
50-40
What is 10
48-20
What is 28
8+5
What is 13
10-6
What is 4
40+30
What is 70
60-40
What is 20
52-20
What is 32
10+9
What is 19
14-7
What is 7
60+30
What is 90
80-40
What is 40
68+30
What is 98
9+8
What is 17
18-6
What is 12
50+50
What is 100
90-30
What is 60
54+40
What is 94