Substituting and evaluating

Substitute one variable

100

5m if m = 2

10

200

5m if m = 10

50

300

5 + m if m = 3

8

400

5^m if m = 3

125

500

5^m if m =1

5

Substitute for two variables

100

a + b if a = 2 and b = 5

7

200

ab² if a =10 and b = 2

40

300

ab² if a =2 and b = 4

32

400

3a + ab if a = 5 and b = 6

45

500

3a + ab if a = 20 and b = 4

140

Challenge

100

d + 4f if d = 10, f = 7

38

200

d + 4f if d = 1/2, f =1

4.5

300

d + 4f if d = 0.2, f = 2

8.2

400

7f – 3d if d = 1/2 , f = 1

5.5

500

d² + f if d = 0.2 and f =2

2.04

Challenge

100

5fd if f = 0.1 and d = 2

1

200

(d+3)/f if d = 1.4 and f = 0.2 

22

300

(df)/5 if d = 0.5 and f = 8

4/5

400

(d+3)/f if d = 0.6 and f = 0.1

36

500

5fd is f = 1/4 and d = 1/3

0.42