Evaluating Expressions

Whole Numbers

100

4x - 5 for x = 4

11

200

2a + 5 for a = 3

11

300

3(2y - 1) + 6 for y = 2

15

400

3(6 - b) + 7 - 2b for b = 4

5

500

n/4 + 2n - 3 for n = 8

15

Decimals

100

6x^2 - 10 for x = 2.3

21.74

200

4(t) + 5 + t^2 for t = 3.3

29.09

300

3s^3 + 7 - 2s for s = 4.5

271.375

400

x^3+ y^2 - z^1 for x = 2.2, y = 5.9, z =4.6

40.858

500

2x^4 + 5L^7 - 6w^3 - 4m^2 for x = 3.3, L = 6.2, w = 4.8, m = 5.1

1760276.895

Fractions

100

6z^2 - x for z = 1/2, x = -1/2

2

200

3x - z for x = 3/5, z =2/3

17/15

300

6L^3 - 8W^4 for L = 9/15, W = 3/5

162/625

400

5a^3 - 10b^2 + 100c for a = 3/5, b = 2/3, c = 1/4

4868/224

500

n^2 + 2m^3 - 85 for n = 8/13, m = 3/4

-453069/5408

Mixed

100

(11 - 3z) + x + y for z = 2, x = 9, y = 5

(11 - 3(2)) + 9 + 5 = 19

200

3p - 2(r - q) for p = 4, r = 5, q = 3

3(4) - 2(5 - 3)= 12 - 2(2) = 12 - 4 = 8

300

(14f - 6c) + e^3 for f = 1.5, c = 117.8, e = 22.4

10553.625

400

2(y^5 - h^2 - 3j) + 2k for y = 4/7, h = 6/7, j = 7/8, k = 8/14

-289875/67228

500

3(2f -4e)^2 - 5g + 6k/6 for f = 9/14, e = 8/9, g = 1/12, k = 6/7

84127/5292

Bonus

100

(n / 2) + 3m for n=50, m=15

(50 / 2) + 3(15) = 60

200

3(2x - 1)^4 + 6y - 9z for x=5, y=7, z= 8

3(2(5) - 1)^4 +6(7) - 9(8) = 3(10-1)^4 + 42 - 72 = 3(9)^4 + 42 - 72 = 19683 + 42 - 72 = 19653

300

10a - (b - c)^5 for a = 7.1269, b = 6.131313, c = 4.444445

57.61042164

400

(2x + 3z)^4 / 12 for

(2(5) +3(3))^4 / 12 = 10860.08333

500

b + 3(2c - 5d)^2 for b= 10/25, c = 4/7, d = 3/8

3851/2240