Domain 2.NBT, Number and Operations in Base Ten
Cluster 2.NBT.A, Understand place value.
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
52 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.
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
94 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