Add
30+25
55
20-7
13
What number is missing: 1,2,3,4,5,7,8,9
6
42-21
21
25+25
50
15+19
34
30-2
28
what number is missing: 21,22,23,24,25,26,28,29
27
55-23
32
44+34
78
81+9
90
40-12
28
What number is missing: 5,10,15,20,25,30,35,45,50
40
84-13
71
71+19
90
45+33
78
60-12
48
What numbers are missing:11,13,14,15,16,18
12 and 17
42-11
31
10+10+10+10+10+10
60
54+46
100
90-29
61
What numbers are missing:
10,20,30,40,50,60,70,90,100,120
80 and 110
98-78
20
25+25+25+25
100