addition
subtraction
addition
and
subtraction
100

100+124

224

100

109-101

108

100

136-120

  16

200

123+234

357

200

125-123

122

200

145+100

245

300

198+100

298

300
12-10

2

400

213+132

345

400

12-12

0

500
33+1

34

500

34-10

24

M
e
n
u