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math
subtraction
addition
orianas
alexias
100

what is 10+10

what is 20

100

1-1

0

100

1+1

2

100

1+1

2

100

10_=19

9

200

1000+1

1001

200

20-10

10

200

40+40

80

200

4+4

8

200

20+20

40

300

50+50

100

300

30-9

21

300

40+50

90

300

2+2

4
300

50+50

100

400

10000000000000000000000000+0

100000000000000000000000000000


400

100-10

90

400

2+2

4

400

10+0

10

400

400+_=800

400

500

1+10000000000000000000000000000000000000

10000000000000000000000000000000000000001

500

60-30

30

500

5+500

505

500

2+_=5

3

500

500+100

60