1. Which number is smaller?
37 41 83 52
37
2+2
4
10 15 20
25
3+7
10
85 86 87
88
25 100 99 17
17
4+4
8
25 30 35
40
2+5
7
101 102 103
104
33 62 26 78
26
12
65 70 75
80
11+1
12
17, 18, 19
20
108 18 81 9
9
9+9
18
85 90 95
100
9+4
13
40 41 42
43
11 95 21 18
11
10+10
20
15 20 25
30
4+3
7
63 64 65
66