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# CCSS.Math.Content.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.

Authors: National Governors Association Center for Best Practices, Council of Chief State School Officers

Title: CCSS.Math.Content.2.NBT.B.7 Add And Subtract Within 1000, Using Concrete... Number and Operations in Base Ten - 2nd Grade Mathematics Common Core State Standards

Publisher: National Governors Association Center for Best Practices, Council of Chief State School Officers, Washington D.C.

(Page last edited 10/08/2017)

1. I4C: Online Practice - Add a three-digit and two-digit number so that the total is within 1000 - These online practice quizzes (interactives) support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 quiz sets available on this topic. Answers are corrected after each question and a quiz results page is also shown which can be printed or emailed to a teacher, parent or mentor.
2. I4C: Online Practice - Add Two 3-Digit Numbers Within 1000 - These online practice quizzes (interactives) support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 quiz sets available on this topic. Answers are corrected after each question and a quiz results page is also shown which can be printed or emailed to a teacher, parent or mentor.
3. I4C: Online Practice - Add Two Numbers Within 1000 - These online practice quizzes (interactives) support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 quiz sets available on this topic. Answers are corrected after each question and a quiz results page is also shown which can be printed or emailed to a teacher, parent or mentor.
4. I4C: Online Practice - Subtract a three-digit from a three-digit number - These online practice quizzes (interactives) support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 quiz sets available on this topic. Answers are corrected after each question and a quiz results page is also shown which can be printed or emailed to a teacher, parent or mentor.
5. I4C: Online Practice - Subtract a two-digit from a three-digit number - These online practice quizzes (interactives) support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 quiz sets available on this topic. Answers are corrected after each question and a quiz results page is also shown which can be printed or emailed to a teacher, parent or mentor.
6. I4C: Printable Worksheets - Add a three-digit and two-digit number so that the total is within 1000 - These worksheets support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 worksheets available on this topic. A master answer key is available.
7. I4C: Printable Worksheets - Add Two 3-Digit Numbers Within 1000 - These worksheets support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 worksheets available on this topic. A master answer key is available.
8. I4C: Printable Worksheets - Add Two Numbers Within 1000 - These worksheets support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 worksheets available on this topic. A master answer key is available.
9. I4C: Printable Worksheets - Subtract a three-digit from a three-digit number - These worksheets support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 worksheets available on this topic. A master answer key is available.
10. I4C: Printable Worksheets - Subtract a two-digit from a three-digit number - These worksheets support the following Common Core State Standard: CCSS.Math.Content.2.NBT.B.7. There are 100 worksheets available on this topic. A master answer key is available.
11. 1000 Chart - Visual chart from 1 to 1000
14. Interactive Base Ten; complete an addition problem using base blocks. - Use this manipulative to represent numerals with base 10 blocks and then add the numbers.
15. Interactive Base Ten; complete an subtraction problem using base blocks. - Use this manipulative to represent numerals with base 10 blocks and then subtract the numbers.
16. Interactive Visual Addition Base Ten - ?Build models to show relationships among tens, hundreds, and thousands.
18. Worksheet; 3 digit addition; decomposing. - Worksheet; example of this type of addition, then complete the exercise.

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