SD51 SD67 Alberta
2, 4, 6, 8, ____
12
11
10
9
103, 100, 97, 94, 91, ____
90
85
80
88
5, 10, 20, 40, ____
45
50
60
5, 8, ____, 14
13
4 + y = 8
1
2
3
4
y - 10 = 20
30
20
5
13 + y = 8
16
20 รท 10 = y
6
8
8 x y = 40