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Question: 75 - 30 Answer: 45
Question: 97 - 76 Answer: 21
Question: 86 - 86 Answer: 0
Question: 60 - 21 Answer: 39
Question: 43 - 35 Answer: 8
Question: 63 - 35 Answer: 28
Question: 88 - 27 Answer: 61
Question: 89 - 88 Answer: 1
Question: 95 - 30 Answer: 65
Question: 71 - 42 Answer: 29
Question: 91 - 46 Answer: 45
Question: 45 - 24 Answer: 21
Question: 38 - 18 Answer: 20
Question: 99 - 78 Answer: 21
Question: 92 - 21 Answer: 71
Question: 85 - 51 Answer: 34
Question: 66 - 41 Answer: 25
Question: 49 - 1 Answer: 48
Question: 68 - 61 Answer: 7
Question: 91 - 16 Answer: 75
Question: 76 - 38 Answer: 38
Question: 67 - 36 Answer: 31
Question: 33 - 30 Answer: 3
Question: 95 - 55 Answer: 40
Question: 40 - 34 Answer: 6
Question: 97 - 18 Answer: 79
Question: 51 - 23 Answer: 28
Question: 52 - 15 Answer: 37
Question: 43 - 26 Answer: 17
Question: 66 - 23 Answer: 43
Question: 57 - 6 Answer: 51
Question: 97 - 20 Answer: 77
Question: 98 - 42 Answer: 56
Question: 66 - 37 Answer: 29
Question: 86 - 11 Answer: 75
Question: 92 - 31 Answer: 61
Question: 77 - 17 Answer: 60
Question: 73 - 26 Answer: 47
Question: 55 - 47 Answer: 8
Question: 38 - 10 Answer: 28
Question: 23 - 7 Answer: 16
Question: 88 - 52 Answer: 36
Question: 61 - 15 Answer: 46
Question: 92 - 49 Answer: 43
Question: 65 - 53 Answer: 12
Question: 86 - 42 Answer: 44
Question: 58 - 6 Answer: 52
Question: 70 - 15 Answer: 55
Question: 25 - 7 Answer: 18
Question: 85 - 1 Answer: 84
Question: 34 - 24 Answer: 10
Question: 60 - 36 Answer: 24
Question: 66 - 17 Answer: 49
Question: 94 - 92 Answer: 2
Question: 47 - 5 Answer: 42
Question: 63 - 26 Answer: 37
Question: 38 - 11 Answer: 27
Question: 81 - 38 Answer: 43
Question: 76 - 43 Answer: 33
Question: 84 - 42 Answer: 42
Question: 77 - 5 Answer: 72
Question: 80 - 26 Answer: 54
Question: 31 - 2 Answer: 29
Question: 36 - 21 Answer: 15
Question: 85 - 33 Answer: 52
Question: 80 - 78 Answer: 2
Question: 52 - 37 Answer: 15
Question: 24 - 19 Answer: 5
Question: 83 - 74 Answer: 9
Question: 65 - 14 Answer: 51
Question: 61 - 8 Answer: 53
Question: 76 - 59 Answer: 17
Question: 45 - 12 Answer: 33
Question: 71 - 27 Answer: 44
Question: 53 - 21 Answer: 32
Question: 29 - 20 Answer: 9
Question: 56 - 55 Answer: 1
Question: 89 - 16 Answer: 73
Question: 72 - 42 Answer: 30
Question: 99 - 31 Answer: 68
Question: 74 - 53 Answer: 21
Question: 53 - 19 Answer: 34
Question: 42 - 4 Answer: 38
Question: 34 - 32 Answer: 2
Question: 51 - 21 Answer: 30
Question: 81 - 71 Answer: 10
Question: 20 - 2 Answer: 18
Question: 93 - 82 Answer: 11
Question: 82 - 17 Answer: 65
Question: 36 - 35 Answer: 1
Question: 95 - 85 Answer: 10
Question: 89 - 46 Answer: 43
Question: 96 - 2 Answer: 94
Question: 74 - 31 Answer: 43
Question: 36 - 2 Answer: 34
Question: 55 - 7 Answer: 48
Question: 100 - 37 Answer: 63
Question: 64 - 21 Answer: 43
Question: 23 - 12 Answer: 11
Question: 95 - 37 Answer: 58
End of preview. Expand in Data Studio

Systematic Subtraction Curriculum (State-Persistent)

This dataset is a tiered subtraction curriculum designed for small LLMs (0.5B - 1.5B). It solves the "Hidden State" problem by explicitly tracking variable mutations during borrowing.

Curriculum Structure

  1. Tier 1: Mental Math (20%) - Direct subtraction for results < 100 to build instant recall.
  2. Tier 2: Debt & Negatives (10%) - Teaches the concept of negative results when subtracting larger from smaller.
  3. Tier 3: Explicit Scratchpad (70%) - Complex multi-digit subtraction with verbose state updates (e.g., "100s becomes 4").

Key Features

  • Explicit Borrowing: Every borrow operation is announced, updating the "Value" of the next column in text.
  • Ordered Learning: Designed for streaming training where the model masters basics before complex algorithms.
  • Zero-Ghosting: No implicit math; every intermediate digit change is tokenized.
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