Show:
b's
f's (remember, add 2 at the end
b's
f's
100

2 x b

b=2


4
100

2 x f 

f = 7

16

100

2 + 2 + b

b = 4

8

100

2 + 45 - 45 + f

4

200

2 x 3 x b

b = 6

36

200

22 - 24 + f

f = 2

2

200

3 x 3 + 3 + b

b = 3

15

200

12 + 12 + f

f = 24 

50

300

2 + 1 + 7 - b

b= 5

5

300

4 - 3 + f

f = 43

46

300

2 - 2 + b

b = 3

3

300

300 - 200 + f

f = 100

202

400

29 - b

b = 3


26

400

2 x 3 + f

f = 4

12

400

1 + 2 + 3 - b

 b = 4

2

400

3 x f 

f = 6

20

500

23 + 65 - b

b= 65

23

500

2 x 5 + 5 + f

f = 5

22

500

2 + 11 - b

b = 3

10

500

90.0 + f - f

f = 2.0

90.2