Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

Number and Operations in Base Ten

- Use place value understanding and properties of operations to add and subtract.

Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

Number and Operations in Base Ten

- Use place value understanding and properties of operations to add and subtract.

Georgia DOE

Last updated:

2015-06-03 17:38:16

No resources have been tagged as aligned with this standard.

- This standard is part of: Use place value understanding and properties of operations to add and subtract.
- This standard is derived from: CCSS.Math.Content.2.NBT.B.8

Standards with the same topic and subject but for other grades

Fluently add and subtract multi-digit whole numbers using the standard algorithm.

Georgia DOE

Last updated:

2015-06-03 17:58:57

Add within 100, including adding a two-digit number and a one-digit number and adding a two-digit number and a multiple of ten (e.g., 24 + 9, 13 + 10, 27 + 40), using concrete models or drawings and strategies based on place value, properties of operations, and/or relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

Georgia DOE

Last updated:

2015-06-03 17:20:27

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

Georgia DOE

Last updated:

2015-06-03 17:20:39

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, 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 and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

Georgia DOE

Last updated:

2015-04-08 13:03:28

Georgia DOE

Last updated:

2015-04-08 13:03:28

Standards derived from the same national standard

Florida DOE

Last updated:

2015-04-08 13:03:28

Maine DOE

Last updated:

2013-06-20 10:16:46

South Dakota DOE

Last updated:

2013-06-20 16:43:23

North Carolina DOE

Last updated:

2015-06-23 09:57:13

North Dakota DOE

Last updated:

2015-04-08 13:03:28

Newsletter sign-up form

Share My Lesson