Workbook Detail
Subtraction Within 20 Easy — Set 83
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"id": 10,
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"id": 11,
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"question": "12 - 11 = ___",
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"id": 12,
"operand1": 14,
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"question": "14 - 1 = ___",
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"id": 16,
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"question": "9 - 7 = ___",
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"id": 18,
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"id": 19,
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"id": 20,
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}Teaching Notes
15
-11
19
-4
9
-1
7
-3
8
-2
9
-3
5
-2
5
-3
19
-13
11
-1
12
-11
14
-1
14
-10
13
-3
2
-1
9
-7
8
-7
5
-3
15
-5
15
-10
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