Math Practice Online > free > lessons > Florida > 4th grade > Variable Substitution

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

### Complexity=2

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

### Complexity=4

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

### Complexity=6

Evaluate.
11(3 + n) where n = 7
Solution
3 + 7 = 10
Remove parentheses.
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

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