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Rules
Add em up
Subtract
Multiply
Divide
100

Pos + Pos = 

Pos

100

12 + -9=

3

100

5- (-6) =

11

100

4 x 13 =

52

100

20 / 5 =

4

200

Pos + Neg = 

Sign of the larger Number

200

-1 + -12 =

-13

200

-23 - 34 = 

-57

200

-6 x 4 =

-24

200

-15 / 3 =

-5

300

whats our saying for Subtraction ONLY

KCC

300

-1.3 + 12.2 =

10.9

300

-70 - 10 =

-80

300

-5 x -4 = 

20

300

-48 / -12 =

4

400

Same sign x Same sign =

Positive 

400

-43 + 120 =

77

400

-3 - 23 - (-2) =

-24

400

-32 x 2 x -10 =

640

400

122 / 10 / -2 = 

-6.1

500

different sign x different sign =

Negative 

500

-23 + 32 + -34 =

-25

500

-12 - 43 - (-122) =

67

500

38 x -21 x 3 =

-2,394

500

-231 /7 / -11=

-3