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Variable Substitution - Sample Math Practice Problems

The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance. Answers to these sample questions appear at the bottom of the page. This page does not grade your responses.

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Complexity=2

Evaluate.

1.   (20 - 1 - n) + 9 where n = 17
2.   6 + (n/9) where n = 9

Complexity=4

Evaluate.

1.   n + (42/7) where n = 6
2.   21 - (9 + n) where n = 0

Complexity=6

Evaluate.

1.   7(2 • n) where n = 5
2.   (n/10) + 7 where n = 100

Answers


Complexity=2

Evaluate.

#ProblemCorrect AnswerYour Answer
1(20 - 1 - n) + 9 where n = 17
Solution
20 - 1 - 17 = 2
Remove parentheses.
2 + 9 = 11
#ProblemCorrect AnswerYour Answer
26 + (n/9) where n = 9
Solution
9/9 => 1
Remove parentheses.
6 + 1 = 7

Complexity=4

Evaluate.

#ProblemCorrect AnswerYour Answer
1n + (42/7) where n = 6
Solution
42/7 => 6
Remove parentheses.
6 + 6 = 12
#ProblemCorrect AnswerYour Answer
221 - (9 + n) where n = 0
Solution
Remove parentheses.
21 - 9 = 12

Complexity=6

Evaluate.

#ProblemCorrect AnswerYour Answer
17(2 • n) where n = 5
Solution
2 × 5 = 10
Remove parentheses.
7 × 10 = 70
#ProblemCorrect AnswerYour Answer
2(n/10) + 7 where n = 100
Solution
100/10 => 10
Remove parentheses.
10 + 7 = 17
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