Show:
positive numbers
negative
positive and negative
negative and positive
all
100

8 x 8

64

100

-3 x -2

6

100

8 x -2

-16

100

-14 x 2

-28

100

-40 x 40

-1600

200

0 x 200

0

200

-8 x -8

64

200

5 x -5

-25
200

-100 x 6

-600

200

80 x 80 

6400

300

3 x 10

30

300

-10 x -10

100

300

20 x -40

-800

300

-200 x 20

-4000

300

50 x -30

-1500

400

20 x 20

40

400

-40 x -40

80

400

600 x -70

-42000

400

-500 x 40

-20000

400

60 x 70

4200

500

5 x 5

25

500
-20 x -10

30

500

700 x -90

-63000

500

-90 x 10

-900

500

1000 x -30

-30000