fact-family/mixed-within-20-fill-blanks · 套题 45
5 problems
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1
Write the fact family for 15, 1, 16:
=
2
Write the fact family for 17, 3, 20:
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3
Write the fact family for 3, 11, 14:
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4
Write the fact family for 3, 1, 4:
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5
Write the fact family for 17, 1, 18:
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