1.NBT.C.5 Worksheets, Workbooks, Lesson Plans, and Games

CCSS.MATH.CONTENT.1.NBT.C.5:
"Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used."

These worksheets, games, and lesson plans can help students practice this Common Core State Standards skill.

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