+plus
-minus
+plus and -minus
100

160+150

310

100

900-600

300

100

300+600

900

200

246+135

381

200

246-135

111

200

680-579

101

300

432+345

777

300

315-203

112

300

245+123

368

400

298+579

877

400

574-275

299

400

746-347

399

500

5,789+10,000

15,789

500

15,000-8,789

6211

500

14,876+15,789

30,578