b189a kumon subtraction of 3-digit numbers 3
i. fill in the missing numbers in the number sequences.
(1) 120, 118, 116, ,
(2) 133, 130, 127, ,
(3) 140, 135, 130, ,
(4) 157, 152, 147, ,
(5) 170, 160, 150, ,
(6) 190, 170, 150, ,

Question

b189a kumon subtraction of 3-digit numbers 3
i. fill in the missing numbers in the number sequences.
(1) 120, 118, 116,  ,
(2) 133, 130, 127,  ,
(3) 140, 135, 130,  ,
(4) 157, 152, 147,  ,
(5) 170, 160, 150,  ,
(6) 190, 170, 150,  ,

Accepted Answer

{ "quality": "clear", "question_count": 6, "skills_matched": [ "step_cot", "table_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Number Sequences", "Arithmetic Patterns" ], "new_concepts": [], "current_concepts": [ "Number Sequences", "Arithmetic Patterns" ] } ## Analyze sequences (1) to (3) $$ \begin{aligned} &\text{(1) } 120, 118, 116 \implies \text{Rule: } -2 \implies 116 - 2 = 114, \quad 114 - 2 = 112\ &\text{(2) } 133, 130, 127 \implies \text{Rule: } -3 \implies 127 - 3 = 124, \quad 124 - 3 = 121\ &\text{(3) } 140, 135, 130 \implies \text{Rule: } -5 \implies 130 - 5 = 125, \quad 125 - 5 = 120 \end{aligned} $$ ## Analyze sequences (4) to (6) $$ \begin{aligned} &\text{(4) } 157, 152, 147 \implies \text{Rule: } -5 \implies 147 - 5 = 142, \quad 142 - 5 = 137\ &\text{(5) } 170, 160, 150 \implies \text{Rule: } -10 \implies 150 - 10 = 140, \quad 140 - 10 = 130\ &\text{(6) } 190, 170, 150 \implies \text{Rule: } -20 \implies 150 - 20 = 130, \quad 130 - 20 = 110 \end{aligned} $$ | No. | Answer | |---|---| | (1) | 114, 112 | | (2) | 124, 121 | | (3) | 125, 120 | | (4) | 142, 137 | | (5) | 140, 130 | | (6) | 130, 110 | { "subject": "Mathematics", "question_type": "Fill-in-the-blank", "knowledge_point": [ "Mathematics", "Algebra", "Arithmetic Patterns" ] }

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Explanation:

Analyze sequences (1) to (3)

Analyze sequences (4) to (6)

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