Show:
one digit by one digit subtraction
One digit by one digit addition
10 Subtraction
More Addition 2
100

8-2=

6

100

6+2=

8

100

10-2=

8
100

5+5=

10

200

9-4=

5

200

3+4=

7

200

10-3=

7
200

17+4=

21

300

8-5=

3

300

9+6=

15

300

10-6=

4

300

18+4=

22

400

6-5=

1

400

5+4=

9

400

10-7=

3
400

24+8=

32

500

9-9=

0

500

7+8=

15

500

10-9=

1
500

36+9=

45