Show:
subtraction from
1-100
adition from 1 - 100
100

80-30

50

100

50+50

100

200

90-60

30

200

E2=mc means what i am kiding it is 90-80

10

300

60-10

50

300

70-60

10

400

10-5

5

400

80-20

60

500

60-30

30

500

59-46

13