Show:
Adding negative and positive integers
Subtracting negative and positive integers
Multiplying negative and positive integers
Dividing negative and positive integers
100

-30 + -9

-21

100

100-90

10

100

-6 x 8

-48

100

(- 1/5) (-10) (3) (-7)

-42

200

-80 + -68

-12

200

94 - + 20

66

200

(-7) x (-9)

63

200

90/-10

-9

300

90 + -90

0

300

100 - ( + 32)

68

300

(-8)(-5)(-2)

-80

300

(4)(-8)/-10

3.2

400

47 + 19

58

400

-16 - 9

-25

400

(-3)(4)(-2)

24

400

(3)(-12)(10)/(3)(-6)

20

500

(72) - (- 90)

172

500

-6 + 8

2

500

(11)(-6)

-66

500

(-3)(-12)(-2)/-6

12