2 x ?
doubles
3 x ? =
100

2 x ___ = 16

8


100

5 x 5 = 

25

100

3 x 4 = 

12

200

2 x ____ = 20

10

200

3 x 3 =

9

200

3 x 6 = 

18

300

2 x ____ = 24

12

300

4 x 4 = 

16

300

3 x 5 = 

15

400

2 x ___ = 10

5

400

10 x 10 = 

100

400

3 x 9 = 

27

500

2 x ___ = 22

11

500

6 x 6 = 

36

500

3 x 11 = 

33