Show:
Addition
Who knows it could be anything
Subtraction
Add positive and negative numbers
Subtract positive and negative numbers
100

  6

+4

----

10

100

2 + 2 = 

4

100

  2

-1

----

1

100

3 + -3 = 

0

100

-2 - (-3) =

1

200

  3

+6

----

9

200

6 - 3 = 

3

200

8 - 3 =

5

200

-1 + -1 =

 -2

200

8 - (-4) = 

12

300

  3

+4

----

7

300

1/2 of 20 =

10

300

9 - 2 = 

7

300

32 + -8 =

24

300

6 - 6 = 

0

400

  26

+10

------

36

400

5/6 of 24 = 

20

400

  96

-63

-----

33

400

-47 + 30 = 

-17

400

2 - (-3) =

5

500

  22

+50

------

72

500

1/20 + 1/5 =

1/4

500

59 - 33 =

26

500

-67 + -67 = 

-134

500

-4 - (-7) = 

3