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- 2.NBT.A.1Understand 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:
- 2.NBT.A.2Count within 1000; skip-count by 5s, 10s, and 100s.
- 2.NBT.A.3Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
- 2.NBT.A.4Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

Hundreds, Tens, Ones Are Coins Too

2nd Grade Math

» Unit:

Everything In Its Place

Big Idea:Students will extend their understanding of hundreds, tens and ones using dollars, dimes and pennies as another way to express groups of 100, 10 and 1.

How Big Is One Thousand

2nd Grade Math

» Unit:

More Complex Numbers and Operations

Big Idea:Students can get a picture of how big 1,000 is as they build and compare 3-digit numbers.

2.NBT.A.1a

100 can be thought of as a bundle of ten tens — called a “hundred.”

2.NBT.A.1b

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).