Substitute or Evaluate
Either of these terms can be used.
To evaluate an algebraic expression, replace each variable with a number and then simplify.
Examples: Evaluate the following when, d = 9 and g = 5.
1) d + g 2) 3d - 2g
Examples: Evaluate the following when, d = 9 and g = 5.
1) d + g 2) 3d - 2g
3) d² + g³ 4) 3(2d - 4) - 7
5
5
Try the problems then click on the link to see the answers.
Practice Problems - A
Evaluate the following when, a = 3 and b = -7.
1) 4a 2) a - b
3) 7b + 7a 4) 5(a + 3)
5) b² + a³ 6) 2a² - b
7) 30 + a - b 8) 8(9a - 4a)
a + 1
9) 2(3b² + a³) 10) ab + 2ab
a
Practice Problems - A
Evaluate the following when, a = 3 and b = -7.
1) 4a 2) a - b
3) 7b + 7a 4) 5(a + 3)
5) b² + a³ 6) 2a² - b
7) 30 + a - b 8) 8(9a - 4a)
a + 1
9) 2(3b² + a³) 10) ab + 2ab
a