Sub
90 - 60 =
30
500 + 45=
545
24, ___, 34, 39
29
900, 1000, 1100, 1200
100s
12 - 6 =
6
82 + 4 =
86
799, 797, 795, _____
793
65, 70, 75, 80
5s
265 - 4=
261
40 + 45 =
85
30, 40, ____, 60
50
41, 51, 61, 71
10s
95 - 40 =
55
55 + 8 =
63
58, 158, 258, _____
358
17, 19, 21, 23
2s