﻿ Common Core Standards for Math - Kindergarten

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## Understand Place Value

2.NBT.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:
• 100 can be thought of as a bundle of ten tens — called a “hundred.”
• 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).
2.NBT.2. Count within 1000; skip-count by 5s, 10s, and 100s.

2.NBT.3. Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

 Visual Representation of 3 Digit Numbers Expanded Form Expanded Notation

2.NBT.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.

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

• 2.NBT.5. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
• 2.NBT.6. Add up to four two-digit numbers using strategies based on place value and properties of operations.
 Add a One Digit Number to a Two Digit Number with Regrouping Add a One Digit Number to a Two Digit Number with Regrouping Add Two Digit Numbers With Regrouping - Includes Visual Prompts Add Two Digit Numbers With Regrouping - Includes Visual Prompts Add Two Digit Numbers with Regrouping This set of worksheets has more problems per page and fewer prompts.
• 2.NBT.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.
 Add Three Digit Numbers Without Regrouping Add Three Digit Numbers With Regrouping
• 2.NBT.8. Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
 Add Ten to 3 Digit Numbers  - Includes Visual Prompts
• 2.NBT.9. Explain why addition and subtraction strategies work, using place value and the properties of operations.
 Related Addition Facts Related Subtraction Facts Fact Families

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