Math Practice Online: MathScore.com

Math Practice Online > free > lessons > Hawaii > 8th grade > Variable Substitution

If your child needs math practice, click here.

These sample problems below for Variable Substitution were generated by the MathScore.com engine.

Sample Problems For Variable Substitution

Complexity=2

Evaluate.
1.   17 + (n + 2) where n = 9
2.   (n(4)) + 9 where n = 2

Complexity=4

Evaluate.
1.   (4(1)) + n where n = 13
2.   30 - (n - 12) where n = 14

Complexity=6

Evaluate.
1.   1(3 + n) where n = 7
2.   (n/9) + ((22 - 6 - 7) + 2) where n = 81

Answers

Complexity=2

Evaluate.
#ProblemCorrect AnswerYour Answer
117 + (n + 2) where n = 9
Solution
9 + 2 = 11
Remove parentheses.
17 + 11 = 28
#ProblemCorrect AnswerYour Answer
2(n(4)) + 9 where n = 2
Solution
2 × 4 = 8
Remove parentheses.
8 + 9 = 17

Complexity=4

Evaluate.
#ProblemCorrect AnswerYour Answer
1(4(1)) + n where n = 13
Solution
4 × 1 = 4
Remove parentheses.
4 + 13 = 17
#ProblemCorrect AnswerYour Answer
230 - (n - 12) where n = 14
Solution
14 - 12 = 2
Remove parentheses.
30 - 2 = 28

Complexity=6

Evaluate.
#ProblemCorrect AnswerYour Answer
11(3 + n) where n = 7
Solution
3 + 7 = 10
Remove parentheses.
#ProblemCorrect AnswerYour Answer
2(n/9) + ((22 - 6 - 7) + 2) where n = 81
Solution
81/9 => 9
Remove parentheses.
22 - 6 - 7 = 9
Remove parentheses.
9 + 2 = 11
Remove parentheses.
9 + 11 = 20

MathScore.com

Copyright Accurate Learning Systems Corporation 2008.
MathScore is a registered trademark.