Domain 2.NBT, Number and Operations in Base Ten

Cluster 2.NBT.A, Understand place value.

Major Cluster

Standard 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. Understand the following as special cases:

9 Lessons

53 Activities

Standard 2.NBT.A.1.A

100 can be thought of as a bundle of ten tens - called a "hundred."

0 Lessons

1 Activity

Standard 2.NBT.A.1.B

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).

0 Lessons

0 Activities

Standard 2.NBT.A.2

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

14 Lessons

58 Activities

Standard 2.NBT.A.3

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

11 Lessons

15 Activities

Standard 2.NBT.A.4

Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and

5 Lessons

12 Activities

Cluster 2.NBT.B, Use place value understanding and properties of operations to add and subtract.

Major Cluster

Standard 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.

19 Lessons

146 Activities

Standard 2.NBT.B.6

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

1 Lesson

2 Activities

Standard 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.

63 Lessons

97 Activities

Standard 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.

17 Lessons

10 Activities

Standard 2.NBT.B.9

Explain why addition and subtraction strategies work, using place value and the properties of operations.1

59 Lessons

48 Activities