QUESTION IMAGE
Question
identify the decimals labeled with the letters a, b, and c on the scale below.
letter a represents the decimal
letter b represents the decimal
letter c represents the decimal
<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Decimals on Number Line"
],
"new_concepts": [],
"current_concepts": [
"Decimals on Number Line"
]
}
</pre_analysis>
<reasoning>
Determine the scale interval
The distance between the labeled points \(16.9\) and \(17\) is:
\[
17 - 16.9 = 0.1
\]
Counting the tick marks between \(16.9\) and \(17\), there are exactly \(10\) equal subdivisions. Therefore, each tick mark represents:
\[
\frac{0.1}{10} = 0.01
\]
Find the value of A
Point \(A\) is located \(4\) tick marks to the right of \(16.9\):
\[
A = 16.9 + 4 \times 0.01 = 16.9 + 0.04 = 16.94
\]
Find the values of B and C
Point \(B\) is located \(4\) tick marks to the right of \(17\):
\[
B = 17 + 4 \times 0.01 = 17.04
\]
Point \(C\) is located \(7\) tick marks to the left of \(16.9\):
\[
C = 16.9 - 7 \times 0.01 = 16.9 - 0.07 = 16.83
\]
</reasoning>
<answer>
Letter A represents the decimal 16.94
Letter B represents the decimal 17.04
Letter C represents the decimal 16.83
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Decimals on Number Line"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Decimals on Number Line"
],
"new_concepts": [],
"current_concepts": [
"Decimals on Number Line"
]
}
</pre_analysis>
<reasoning>
Determine the scale interval
The distance between the labeled points \(16.9\) and \(17\) is:
\[
17 - 16.9 = 0.1
\]
Counting the tick marks between \(16.9\) and \(17\), there are exactly \(10\) equal subdivisions. Therefore, each tick mark represents:
\[
\frac{0.1}{10} = 0.01
\]
Find the value of A
Point \(A\) is located \(4\) tick marks to the right of \(16.9\):
\[
A = 16.9 + 4 \times 0.01 = 16.9 + 0.04 = 16.94
\]
Find the values of B and C
Point \(B\) is located \(4\) tick marks to the right of \(17\):
\[
B = 17 + 4 \times 0.01 = 17.04
\]
Point \(C\) is located \(7\) tick marks to the left of \(16.9\):
\[
C = 16.9 - 7 \times 0.01 = 16.9 - 0.07 = 16.83
\]
</reasoning>
<answer>
Letter A represents the decimal 16.94
Letter B represents the decimal 17.04
Letter C represents the decimal 16.83
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Algebra",
"Decimals on Number Line"
]
}
</post_analysis>