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Doubles
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100

2x3

What is 6

100

6x9

What is 54

100

5x5

What is 25

100

2x9

What is 18

100

8x11

What is 88

200

4x2

What is 8

200

7x9

What is 63

200

4x4

What is 16

200

3x6

What is 18

200

6x11

What is 66

300

3x4

What is 12

300

6x7

What is 42

300

9x9

What is 81

300

5x9

What is 45

300

4x12

What is 48

400

5x4

What is 20

400

8x6

What is 48

400

8x8

What is 64

400

4x7

What is 28

400

9x12

What is 108

500

5x3

What is 15

500

7x8

What is 56

500

7x7

What is 49

500

8x9

What is 72

500

11x12

What is 132