4.oa.1 Worksheets | Free - CommonCoreSheets - Free Printable

Let's solve each problem step by step and explain the reasoning behind each answer.

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1) Determine which choice best represents the equation: 10 is 5 times as many as 2

We are looking for an expression that shows 10 = 5 × 2.

- A. 5 + 5 = 10 → This is addition, not multiplication. Incorrect.
- B. 5 × 5 = 10 → 5 × 5 = 25 ≠ 10 → Incorrect.
- C. 5 × 2 = 10 → Yes! This matches the statement "10 is 5 times as many as 2". ✔
- D. 10 = 2 × 5 → Same as C, just written differently. Also correct.

✔ Answer: C and D

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2) Determine which choice best represents the equation: 54 is 9 times as many as 6

We want: 54 = 9 × 6

- A. 6 × 6 = 54 → 36 ≠ 54 → Incorrect
- B. 54 ÷ 6 = 9 → This is true, but it’s division. The question asks for a multiplication representation.
- C. 54 = 9 × 6 → Exactly matches! ✔
- D. 54 = 6 + 9 → Addition → 63 ≠ 54 → Incorrect

✔ Answer: C

*(Note: B is mathematically correct but does not represent multiplication; the question asks for multiplication equations.)*

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3) Determine which choice best represents the equation: 27 is 9 times as many as 3

We want: 27 = 9 × 3

- A. 27 ÷ 3 = 9 → True, but division → not multiplication
- B. 27 = 9 × 3 → Yes! ✔
- C. 3 × 9 = 27 → Same as B, just order swapped → also correct ✔
- D. 9 × 3 = 27 → Same as above → correct ✔

✔ Answer: B, C, D

(Note: All three express the same multiplication fact.)

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4) Determine which choice best represents the equation: 48 is 6 times as many as 8

We want: 48 = 6 × 8

- A. 8 × 6 = 48 → Yes, this is correct ✔
- B. 6 × 8 = 48 → Also correct ✔
- C. 48 = 8 × 6 → Correct ✔
- D. 48 = 6 + 6 → 12 ≠ 48 → Incorrect

✔ Answer: A, B, C

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5) Determine which choice best represents the equation: 40 is 4 times as many as 10

We want: 40 = 4 × 10

- A. 10 × 4 = 40 → Yes ✔
- B. 4 × 4 = 16 → No → Incorrect
- C. 4 × 10 = 40 → Yes ✔
- D. 4 + 10 = 14 → No → Incorrect

✔ Answer: A and C

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6) Determine which choice best represents the equation: 48 is 8 times as many as 6

We want: 48 = 8 × 6

- A. 48 ÷ 8 = 6 → True, but division → not multiplication
- B. 48 = 6 × 8 → Yes ✔
- C. 48 = 6 + 6 → 12 ≠ 48 → Incorrect
- D. 6 × 8 = 48 → Yes ✔

✔ Answer: B and D

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7) Determine which choice best represents the equation: 35 is 5 times as many as 7

We want: 35 = 5 × 7

- A. 35 = 7 × 5 → Yes ✔
- B. 5 × 7 = 35 → Yes ✔
- C. 7 × 5 = 35 → Yes ✔
- D. 35 = 7 + 7 → 14 ≠ 35 → Incorrect

✔ Answer: A, B, C

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8) Determine which choice best represents the equation: 12 is 2 times as many as 6

We want: 12 = 2 × 6

- A. 12 = 6 × 6 → 36 ≠ 12 → Incorrect
- B. 6 × 2 = 12 → Yes ✔
- C. 12 = 2 × 6 → Yes ✔
- D. 2 + 4 = 12 → 6 ≠ 12 → Incorrect

✔ Answer: B and C

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9) Determine which choice best represents the equation: 12 is 6 times as many as 2

We want: 12 = 6 × 2

- A. 12 = 6 × 6 → 36 ≠ 12 → Incorrect
- B. 12 = 6 × 2 → Yes ✔
- C. 12 = 2 × 6 → Yes ✔
- D. 12 = 6 + 2 → 8 ≠ 12 → Incorrect

✔ Answer: B and C

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10) Determine which choice best represents the equation: 70 is 10 times as many as 7

We want: 70 = 10 × 7

- A. 7 × 7 = 49 → Not 70 → Incorrect
- B. 70 = 10 + 10 → 20 ≠ 70 → Incorrect
- C. 10 × 7 = 70 → Yes ✔
- D. 70 = 10 × 7 → Yes ✔

✔ Answer: C and D

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✔ Final Answers:

| Question | Answer(s) |
|--------|----------|
| 1 | C, D |
| 2 | C |
| 3 | B, C, D |
| 4 | A, B, C |
| 5 | A, C |
| 6 | B, D |
| 7 | A, B, C |
| 8 | B, C |
| 9 | B, C |
| 10 | C, D |

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🔍 Explanation Summary:

These problems test understanding of multiplication as comparison — meaning "A is X times as many as B" translates to A = X × B.

We look for:
- Multiplication equations (not addition or division)
- Equations that correctly show the relationship
- Commutative property applies: a × b = b × a, so both orders are acceptable unless specified otherwise

Always check if the equation reflects the correct numbers and operation.

Let me know if you'd like this formatted as a printable answer key!