Double it!
Double, double
Using your hands
x 9
Mental Madness
100

2 × 6 = 

12

100

4 × 5 = 

20

100

6 × 7 = 

42
100

9 × 4 = 

36

100

4 × 18 = 

72

200

2 × 12 = 

24

200

4 × 8 = 

32

200

7 × 8 = 

56

200

9 × 7 = 

63

200

8 × 15 = 

120

300

2 × 18 = 

36
300

4 × 12 = 

48

300

8 × 9 = 

72

300

9 × 12 = 

108

300

9 × 13 = 

117

400

2 × 27 = 

54
400

4 × 16 = 

64

400

6 × 8 = 

48

400

9 × 15 = 

135

400

84 ÷ 4 = 

21

500

2 × 46 =

92
500

4 × 23 = 

92

500

9 × 6 =

54

500

9 × 24 =

216

500

160 ÷ 8 =

20

M
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