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Grade 5 Pre-Algebra worksheet focusing on evaluating algebraic expressions with one variable.

A worksheet titled "Algebraic expressions (1 variable)" from K5 Learning, designed for Grade 5 Pre-Algebra, featuring exercises to evaluate expressions with variables x and y at given values.

A worksheet titled "Algebraic expressions (1 variable)" from K5 Learning, designed for Grade 5 Pre-Algebra, featuring exercises to evaluate expressions with variables x and y at given values.

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Show Answer Key & Explanations Step-by-step solution for: Grade 5 Algebra Worksheets with Answers | Worsheets library
Let’s solve each expression step by step. We’ll substitute the given value for the variable and then do the math.

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Part A: Evaluate when x = 9

1) x + 12 → 9 + 12 = 21
2) 8 + x → 8 + 9 = 17
3) 20 + x → 20 + 9 = 29
4) 4 + x → 4 + 9 = 13
5) x + 14 - 15 → 9 + 14 = 23; 23 - 15 = 8
6) x - 3 → 9 - 3 = 6
7) 1 + x → 1 + 9 = 10
8) x - 1 → 9 - 1 = 8
9) x + 11 → 9 + 11 = 20
10) x + 6 → 9 + 6 = 15

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Part B: Evaluate when y = 5

11) y + 17 → 5 + 17 = 22
12) y + 18 → 5 + 18 = 23
13) y - 5 → 5 - 5 = 0
14) 12 + y → 12 + 5 = 17
15) y + 14 - 13 → 5 + 14 = 19; 19 - 13 = 6
16) 11 - y → 11 - 5 = 6
17) y - 2 → 5 - 2 = 3
18) 9 + y → 9 + 5 = 14
19) y + 7 → 5 + 7 = 12
20) y + 15 - 5 → 5 + 15 = 20; 20 - 5 = 15

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Final Answer:
A: 1) 21, 2) 17, 3) 29, 4) 13, 5) 8, 6) 6, 7) 10, 8) 8, 9) 20, 10) 15
B: 11) 22, 12) 23, 13) 0, 14) 17, 15) 6, 16) 6, 17) 3, 18) 14, 19) 12, 20) 15
Parent Tip: Review the logic above to help your child master the concept of worksheet algebra equations.
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