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STANDARDS

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US-NY

Math

New York Math

Grade 2: Number and Operations in Base Ten

Understand place value.

NY-2.NBT.1

Understand that the digits of a three-digit number represent amounts of hundreds, tens, and ones.

NY-2.NBT.1.a

Mostly covered
Understand 100 can be thought of as a bundle of ten tens, called a “hundred.”

NY-2.NBT.1.b

Fully covered
Understand the numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).

NY-2.NBT.2

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

NY-2.NBT.3

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

NY-2.NBT.4

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.

Use place value understanding and properties of operations to add and subtract.

NY-2.NBT.5

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.

NY-2.NBT.6

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

NY-2.NBT.7a

Mostly covered
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 representation.

NY-2.NBT.7b

Mostly covered
Understand that in adding or subtracting up to 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.

NY-2.NBT.8

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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NY-2.NBT.9

Not covered
Explain why addition and subtraction strategies work, using place value and the properties of operations.
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