Math Review - Expression, Equations, and Formulae

Writing Expressions

100

Write an expression for “a number plus 6.

x + 6

200

Write an expression for double a number decreased by 5.

2x - 5

300

Write an expression for “three times the sum of a number and 4.”

3(x+4) 

400

Write an expression for “seven times a number, then add 9.”

7x + 9

500

Write an expression for “the square of a number, minus three times the number.”

x² – 3x

Substituting Variables

100

Evaluate 5x when x = 3.

15

200

Evaluate 2y + 7 when y = 4.

15

300

Evaluate 3a² – 4 when a = 5.

71

400

Evaluate 6m – 2n when m = 4, n = 3.

18

500

Evaluate 2p² + 3q when p = 6, q = 5.

87

Simplifying Expressions

100

Simplify 3x + 2x

5x

200

Simplify 4a + 5 – 2a + 3

2a + 8

300

Simplify 6y – 3 + 2y + 7

8y + 4

400

7x + 4x – 9 + 3

11x – 6

500

Simplify 10y – 3y + 8 – 5 + 2y

9y + 3

Expanding Brackets

100

Expand 2(x + 3)

2x + 6

200

Expand 4(y – 2)

4y – 8

300

Expand –3(x – 5)

–3x + 15

400

Expand 5(2a + 7)

10a + 35

500

Expand –6(3m – 4)

–18m + 24

One/Two Step Equation Solving

100

Solve x + 7 = 12

5

200

Solve 3y = 21

7

300

Solve 2x + 5 = 15

x = 5

400

Solve 4a – 7 = 13

a = 5

500

Solve 3x – 8 = 13

7