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100

6 + 1 =

7

100

8 + 21 = 

29

100

-8 + 4 =

-4

100

-156 + (-183) = 

-339

100

17 + (-45) = 

-28

200

7 + 2 =

9

200

-11 + (-12)

-23

200

7 + (-2) =

5

200

-86 + 7 = 

-79

200

-1,785 + (-2,568) = 

-4,353

300

-3 + (-2) =

-5

300

-36 + (-47)

-83

300

-5 + 5 = 

0

300

94 + (-36) =

58

300

7,890 + (-2,710) =

5,180

400

-5 + (-4) =

-9

400

79 + 84 = 

163

400

-19 + 11 =

-8

400

-112 + 95 = 

-17

400

-3,782 + 2,764 =

-1,018

500

23 + 12 = 

35

500

-127 + (-185) = 

-312

500

43 + (-21) = 

22

500

-144 + (-378) = 

-522

500

-15,787 + 13,478 =

-2,309