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Grade
1
Domain
Number and Operations in Base Ten
Cluster
Use place value understanding and properties of operations to add and subtract.
Standard
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
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.
Number Square
