🧠 Grade 5 Math Quiz · 3. Algebra

Identify unknown values Practice Questions

70 Grade 5 questions on Identify unknown values. Choose an answer to get instant feedback and a short explanation — the first 10 are free.

In the equation x + 7 = 15, what is the unknown value x?

Explanation: Wonderful! x = 15 - 7 = 8. You're doing so well identifying unknown values!

If y - 6 = 14, what is y?

Explanation: Excellent! y = 14 + 6 = 20. Great job!

In 4z = 28, what is the unknown value z?

Explanation: Wonderful! z = 28 ÷ 4 = 7. Super!

If m ÷ 5 = 9, what is m?

Explanation: m = 9 × 5 = 45. Champion!

Sara has x apples. After eating 9 she has 16 left. What is x?

Explanation: x - 9 = 16 so x = 25. Real-life apple problem!

In the expression 3 × k + 5 = 23, what is k?

Explanation: 3k + 5 = 23 → 3k = 18 → k = 6. Excellent!

If p - 12 = 25, what is the unknown value p?

Explanation: p = 25 + 12 = 37. You're shining!

In 8n = 56, what is n?

Explanation: n = 56 ÷ 8 = 7. Great!

Emma had x stickers. She gave 15 away and has 30 left. What is x?

Explanation: x - 15 = 30 so x = 45. Champion!

If b ÷ 4 = 11, what is b?

Explanation: b = 11 × 4 = 44. Real shopping problem!

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