Question

elinor solved this problem. is her answer correct?

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$$\begin{array}{r} 8.93 \\\\ \\times \\quad 0.15 \\\\ \\hline 4465 \\\\ +\\quad 8930 \\\\ \\hline 13.395 \\end{array}$$

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no, elinor should have placed the decimal point between the 1 and the 3.
no, she should have placed the decimal point between the 3 and the 9.
no, she did not align the place values in the partial products correctly.
yes, elinor did not make an error.

Explanation:

Perform multi-digit multiplication

Using the Multi-Digit Multiplication knowledge point

$$
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$$

Determine decimal placement

Using the Decimal Multiplication and Decimal Places knowledge points

$$
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$$

Identify the error in the work

The student's work shows the final sum as \(13.395\), which places the decimal point between the first \(3\) and the second \(3\).
Since the correct product is \(1.3395\), the decimal point should have been placed between the \(1\) and the first \(3\).
This corresponds to the first option: "No, Elinor should have placed the decimal point between the 1 and the 3."

Answer:

• (A) No, Elinor should have placed the decimal point between the 1 and the 3. (Correct answer)
• (B) No, she should have placed the decimal point between the 3 and the 9.
• (C) No, she did not align the place values in the partial products correctly.
• (D) Yes, Elinor did not make an error.