Show:
ADDITION
SUBTRACTION
MULTIPLICATION
2#'s + 1#
2#'s + 2#'s
100

1+2=

3

100

1-1=

0

100

1X1=

1

100

10+1=

11

100

10+10=

20

200

5+3=

8

200

2-0=

2

200

2X0=

0

200

12+2

14

200

10+12

22

300

8+2=

10

300

5-3=

2

300

2X2=

6

300

11+5

16

300

11+11=

22

400

7+4=

10

400

8-3=

5

400

5X5=

25

400

13+7

20

400

12+12=

24

500

7+7=

14

500

10-6=

4

500

10X5=

50

500

15+6=

21

500

15+15=

30