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CCSS.Math.Content.2.NBT.A.1

 

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones.
     

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CCSS.Math.Content.2.NBT.A.2

 

Count within 1000; skip-count by 5s, 10s, and 100s.

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CCSS.Math.Content.2.NBT.A.3

 

Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

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CCSS.Math.Content.2.NBT.A.4

 

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

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CCSS.Math.Content.2.NBT.B.5

 

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

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CCSS.Math.Content.2.NBT.B.6

 

Add up to four two-digit numbers using strategies based on place value and properties of operations.

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CCSS.Math.Content.2.NBT.B.7

 

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

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Picture-based Math

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CCSS.Math.Content.2.NBT.B.8

 

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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CCSS.Math.Content.2.NBT.B.9

 

Explain why addition and subtraction strategies work, using place value and the properties of operations.

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