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Thư Viện Tiếng Anh
Thư viện tài liệu tiếng Anh miễn phí
Subject: Subtraction Within 20
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Find the Missing Fact Family Number
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Fact Family Mix Up
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Fact Family Dice
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Fact Family Triangles with Dice
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Inverse Subtraction Practice
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Frosty Fact Families: Addition and Subtraction
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Number Chart Mystery
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Ten Less
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Here Comes the Ten Monster!
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Subtraction Watermelons
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Subtraction to 20
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Make it Fair With Equal Groups
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The Numbers Are Missing!
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Make it the Same
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Make Your Own Subtraction Problems
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Subtraction Machine
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