Adding and Subtracting +/- Integers

Adding (same sign)

100

9 + 5

+ 14

200

-27 + -41

-68

300

373 + 594

+967

400

-408 + -412

-820

500

-1372 + -2628

-2,000

Subtracting (same sign)

100

8-13

-5

200

-42 - (-12) 

-30

300

-23- (-13)

-10

400

100-529

-429

500

-5432 - (-1725)

-3,707

Adding (different signs)

100

5 + -2

+3

200

-48 + 84

+36

300

68 + -23

+45

400

-319 + 205

-114

500

-2020 + 1919

-101

Subtracting (different signs)

100

-5 - (-10)

+5

200

67 - (-24)

+91

300

-325 - (+50)

-275

400

6240 - (-220)

6460

500

-1234 - (+5678)

+4,444

Decimals (mixed)

100

9.9 - 1.3

+8.6

200

-32.4 + -83.6

-116

300

-42.7 - (-2.7)

-40

400

-234.6 - (+234.6)

-469.2

500

1098 - 99,432

-98,334