100's
1's
10's
-
+
100

100+300=???

400

100

1+2=????

3
100

10+10=????

20

100

20-1=????

19

100

100+11=????

111

200

200+400=????

600

200

3+3=????

6

200

20+20=????

40

200

30-20=????

10

200

200+22=????

222

300
300+300=????

600

300

3+6=????

9
300

30+30=????

60

300

30-10=????

20

300

300+33=????

333

400

100+200=????

300

400

1+4=????

5

400

30+60=????

90

400

40-20=????

20

400

400+44=????

444

500

400+200=????

600

500

9+1=????

10

500

50+50=????

100

500

11-2=????

9

500

500+56=????

556

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