Show:
addition.
subtraction.
mixed
100

5+5

=10

100

6-4

=2

100

3+4

=7

200

10+10

=20

200

8-5

=3

200

4+5

=9

300

40+40

=80

300

40-20

=19

300

7-5

=2

400

4000+5000

=9000

400

7000-5000

=2000

400

300-200

=100

500

8000+8000

=16000

500

90000-80000

=10000

500

9000+5000

=14000