Show:
addition 1
addition 2
addition 3
subtraction 1
subtraction 2
100

10+20

30
100

22+4

26

100

10+50

60

100

15-10

5

100

27-14

13

200

220+10

230

200
289+6

295

200

213+80

293

200

190-12

178

200

200-125

75

300

283+100

383

300

214+120

334

300
304+102

406

300

200-50

150

300
400-200

200

400

129+103

232

400

319+200

519

400

102+700

802

400

150-50

100

400

500-100

400

500

400+100

500

500

881+118

999

500

315+105

420

500

500-300

200

500

900-601

299