Question

question 46
1 pts
round off the following decimal to the nearest tenth.
1.45 =

Explanation:

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"new_concepts": [
"Decimal Rounding",
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<reasoning>

Identify the target digit and the rounding digit

The given number is \(1.45\). We need to round this decimal to the nearest tenth.

• The tenths place is \(4\).
• The digit to its immediate right (the hundredths place) is \(5\).

Apply the rounding rule

Since the digit in the hundredths place is \(5\) (which is greater than or equal to \(5\)), we round up the digit in the tenths place by adding \(1\).
\[
4 + 1 = 5
\]

Write the final rounded value

Replacing the tenths digit with \(5\) and dropping all digits to its right gives:
\[
1.5
\]
</reasoning>

<answer>
Round off the following decimal to the nearest tenth.
\(1.45 =\) <blank>1.5</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:

<pre_analysis>
{
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"step_cot",
"blank_filling_formatter",
"explain_then_answer",
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],
"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Decimal Rounding",
"Rounding Decimals"
],
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"Decimal Rounding"
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}
</pre_analysis>

<reasoning>

Identify the target digit and the rounding digit

The given number is \(1.45\). We need to round this decimal to the nearest tenth.

• The tenths place is \(4\).
• The digit to its immediate right (the hundredths place) is \(5\).

Apply the rounding rule

Since the digit in the hundredths place is \(5\) (which is greater than or equal to \(5\)), we round up the digit in the tenths place by adding \(1\).
\[
4 + 1 = 5
\]

Write the final rounded value

Replacing the tenths digit with \(5\) and dropping all digits to its right gives:
\[
1.5
\]
</reasoning>

<answer>
Round off the following decimal to the nearest tenth.
\(1.45 =\) <blank>1.5</blank>
</answer>

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