Question

question 49
1 pts
round off the following decimal to the nearest tenth:
28.66 =

Explanation:

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<reasoning>

Identify the target place value

The target place value is the tenths place, which is the first digit to the right of the decimal point:
\[
28.\underline{6}6
\]

Examine the rounding digit

The digit immediately to the right of the tenths place is in the hundredths place:
\[
28.6\underline{6}
\]
Since this digit is \(6\), which is greater than or equal to \(5\), we round up.

Round the number

Adding \(1\) to the tenths digit \(6\) gives \(7\), and we drop all digits to the right:
\[
28.66 \approx 28.7
\]
</reasoning>

<answer>
Round off the following decimal to the nearest tenth:

\(28.66 =\) <blank>28.7</blank>
</answer>

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"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Decimal Rounding"
]
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Answer:

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"Decimal Rounding",
"Rounding Decimals"
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</pre_analysis>

<reasoning>

Identify the target place value

The target place value is the tenths place, which is the first digit to the right of the decimal point:
\[
28.\underline{6}6
\]

Examine the rounding digit

The digit immediately to the right of the tenths place is in the hundredths place:
\[
28.6\underline{6}
\]
Since this digit is \(6\), which is greater than or equal to \(5\), we round up.

Round the number

Adding \(1\) to the tenths digit \(6\) gives \(7\), and we drop all digits to the right:
\[
28.66 \approx 28.7
\]
</reasoning>

<answer>
Round off the following decimal to the nearest tenth:

\(28.66 =\) <blank>28.7</blank>
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Decimal Rounding"
]
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