Question

add the decimals.

(20.2001 + 13.3 + 28.33 =)

Explanation:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Decimal Arithmetic"
],
"new_concepts": [],
"current_concepts": [
"Decimal Arithmetic"
]
}
</pre_analysis>

<reasoning>

Align decimal places with trailing zeros

\[

$$\begin{aligned} 20.2001 & ightarrow 20.2001 \\ 13.3\phantom{000} & ightarrow 13.3000 \\ 28.33\phantom{00} & ightarrow 28.3300 \end{aligned}$$

\]

Add the aligned values

\[

$$\begin{array}{r@{\quad}l} 20.2001 \\ 13.3000 \\ +\quad 28.3300 \\ \hline 61.8301 \end{array}$$

\]
</reasoning>

<answer>
Add the decimals.

\(20.2001 + 13.3 + 28.33 =\) <blank>61.8301</blank>
</answer>

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

Answer:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Decimal Arithmetic"
],
"new_concepts": [],
"current_concepts": [
"Decimal Arithmetic"
]
}
</pre_analysis>

<reasoning>

Align decimal places with trailing zeros

\[

$$\begin{aligned} 20.2001 & ightarrow 20.2001 \\ 13.3\phantom{000} & ightarrow 13.3000 \\ 28.33\phantom{00} & ightarrow 28.3300 \end{aligned}$$

\]

Add the aligned values

\[

$$\begin{array}{r@{\quad}l} 20.2001 \\ 13.3000 \\ +\quad 28.3300 \\ \hline 61.8301 \end{array}$$

\]
</reasoning>

<answer>
Add the decimals.

\(20.2001 + 13.3 + 28.33 =\) <blank>61.8301</blank>
</answer>

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