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Common Core State Standard 2.NBT.8
Number & Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
8. Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
Common Core State Standards: 2.NBT.8
Add
and Subtract 10 Worksheet
2
Common Core State Standards:
2.NBT.8 
Number & Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900
Students add and subtract 10 from a number.
Add
and Subtract 100 Worksheet
2
Common Core State Standards:
2.NBT.8 
Number & Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900
Students add and subtract 100 from a number.