Show:
adding-same sign
adding-different sign
random
subtracting-same
subtracting-different
100

-15+-23

-37

100

-12+23

11

100

-12x-20

-240

100
12-6

6

100

20 - -12

8

200

-95+-23

-118

200

45+-32

13

200

-30/-5

-6

200

-5 - -5

0

200

-30 - 6

-24

300

987+678

1665

300

-76+23

-53

300

-5x-10

-50

300

70-5

65

300

-16 - 4

-12
400

1546+1254

2800

400

-185+56

-129

400

12x30

360

400

-90 - -25

65

400

-98 - 12

-86

500

-23+-78

-101

500

-407 + 609

202

500

675/5

135

500

145-25

120

500

125- - 60

-65