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Contenido principal

Common Core Math

Grade 2: Number and Operations in Base Ten


Fully covered
Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.


Mostly covered
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.


Not covered
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
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Fully covered
Explain why addition and subtraction strategies work, using place value and the properties of operations.