b149a kumon
subtraction of 2-digit numbers 3
subtract
(1) \begin{array}{r} 73 \\ - 22 \end{array}
(5) \begin{array}{r} 85 \\ - 46 \end{array}
(2) \begin{array}{r} 73 \\ - 26 \end{array}
(6) \begin{array}{r} 85 \\ - 53 \end{array}
(3) \begin{array}{r} 73 \\ - 35 \end{array}
(7) \begin{array}{r} 85 \\ - 55 \end{array}
(4) \begin{array}{r} 73 \\ - 37 \end{array}
(8) \begin{array}{r} 85 \\ - 77 \end{array}

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Accepted Answer

{ "quality": "clear", "question_count": 18, "skills_matched": [ "step_cot", "table_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Column Subtraction", "Subtraction with Regrouping" ], "new_concepts": [], "current_concepts": [ "Column Subtraction", "Subtraction with Regrouping" ] } ## Subtract values on page B148b $$ \begin{aligned} (9) \quad 81 - 34 &= 47 \ (10) \quad 81 - 30 &= 51 \ (11) \quad 81 - 36 &= 45 \ (12) \quad 81 - 69 &= 12 \ (13) \quad 81 - 65 &= 16 \ (14) \quad 83 - 46 &= 37 \ (15) \quad 83 - 49 &= 34 \ (16) \quad 83 - 47 &= 36 \ (17) \quad 83 - 74 &= 9 \ (18) \quad 83 - 83 &= 0 \end{aligned} $$ ## Subtract values on page B149a $$ \begin{aligned} (1) \quad 73 - 22 &= 51 \ (2) \quad 73 - 26 &= 47 \ (3) \quad 73 - 35 &= 38 \ (4) \quad 73 - 37 &= 36 \ (5) \quad 85 - 46 &= 39 \ (6) \quad 85 - 53 &= 32 \ (7) \quad 85 - 55 &= 30 \ (8) \quad 85 - 77 &= 8 \end{aligned} $$ ### Page B148b | No. | Problem | Answer | |---|---|---| | (9) | $81 - 34$ | $47$ | | (10) | $81 - 30$ | $51$ | | (11) | $81 - 36$ | $45$ | | (12) | $81 - 69$ | $12$ | | (13) | $81 - 65$ | $16$ | | (14) | $83 - 46$ | $37$ | | (15) | $83 - 49$ | $34$ | | (16) | $83 - 47$ | $36$ | | (17) | $83 - 74$ | $9$ | | (18) | $83 - 83$ | $0$ | ### Page B149a | No. | Problem | Answer | |---|---|---| | (1) | $73 - 22$ | $51$ | | (2) | $73 - 26$ | $47$ | | (3) | $73 - 35$ | $38$ | | (4) | $73 - 37$ | $36$ | | (5) | $85 - 46$ | $39$ | | (6) | $85 - 53$ | $32$ | | (7) | $85 - 55$ | $30$ | | (8) | $85 - 77$ | $8$ | { "subject": "Mathematics", "question_type": "Free Response", "knowledge_point": [ "Mathematics", "Algebra", "Column Subtraction" ] }

No.	Problem	Answer
(10)	\(81 - 30\)	\(51\)
(11)	\(81 - 36\)	\(45\)
(12)	\(81 - 69\)	\(12\)
(13)	\(81 - 65\)	\(16\)
(14)	\(83 - 46\)	\(37\)
(15)	\(83 - 49\)	\(34\)
(16)	\(83 - 47\)	\(36\)
(17)	\(83 - 74\)	\(9\)
(18)	\(83 - 83\)	\(0\)

No.	Problem	Answer
(2)	\(73 - 26\)	\(47\)
(3)	\(73 - 35\)	\(38\)
(4)	\(73 - 37\)	\(36\)
(5)	\(85 - 46\)	\(39\)
(6)	\(85 - 53\)	\(32\)
(7)	\(85 - 55\)	\(30\)
(8)	\(85 - 77\)	\(8\)

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Question

Explanation:

Subtract values on page B148b

Subtract values on page B149a

Answer:

Page B148b

Page B149a