MAFS.2.NBT.2.8Archived Standard

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Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
General Information
Subject Area: Mathematics
Grade: 2
Domain-Subdomain: Number and Operations in Base Ten
Cluster: Level 1: Recall
Cluster: Use place value understanding and properties of operations to add and subtract. (Major Cluster) -

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Date Adopted or Revised: 02/14
Content Complexity Rating: Level 1: Recall - More Information
Date of Last Rating: 02/14
Status: State Board Approved - Archived

Related Courses

This benchmark is part of these courses.
5012040: Mathematics - Grade Two (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7712030: Access Mathematics Grade 2 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2022, 2022 and beyond (current))
5012005: Foundational Skills in Mathematics K-2 (Specifically in versions: 2019 - 2022, 2022 and beyond (current))

Related Access Points

Alternate version of this benchmark for students with significant cognitive disabilities.

Related Resources

Vetted resources educators can use to teach the concepts and skills in this benchmark.

Formative Assessments

Subtract 10 Mentally:

Students are given three-digit numbers and asked to mentally subtract 10 from each number.

Type: Formative Assessment

Mentally Subtract 100:

Students are given three-digit numbers and asked to mentally add 100 to each number.

Type: Formative Assessment

Mentally Add 10 More:

Students are given three-digit numbers and asked to mentally add 10 to each number.

Type: Formative Assessment

Add 100 Mentally:

Students are given three-digit numbers and asked to mentally add 100 to each number.

Type: Formative Assessment

Lesson Plans

Hop Up, Hop Down- Three-Digit Numbers:

In this lesson, the students will be adding and subtracting 10 or 100 to/from a given three-digit number. The students will recognize patterns that occur and use these patterns to mentally identify the number that is 10 or 100 more or less than a given number.

Type: Lesson Plan

Hop Up, Hop Down- Two-Digit Numbers:

In this lesson, the students will be adding and subtracting 10 to/from a given two-digit number. The students will recognize patterns that occur and use these patterns to mentally identify the number that is 10 more or less than a given number.

Type: Lesson Plan

Mental Math Mania:

This is a lesson that will ensure students walk away with the vital skill of mentally finding 10 or 100 more or 10 or 100 less than a given three-digit number. There is a partner game included with a little competition involved.

Type: Lesson Plan

Sweet Mental Math:

In this lesson students will learn to use the place value knowledge gained to identify the number that is 10 more, 10 less, 100 more, or 100 less than a given number. This is the continuation of a story found in previous lessons "Sweet Addition and Subtraction"and "Sweet Place Values."

Type: Lesson Plan

Tic Tac Toe by Tens and Hundreds:

This is an engaging hands-on activity which challenges students as they learn to find 10 or 100 more or less than a given number three-digit number.

Type: Lesson Plan

Original Student Tutorials

Place Value Party - Part 5: 100 Less:

Learn how to create numbers that are 100 less as you wrap up the place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

 

Type: Original Student Tutorial

Place Value Party - Part 4:

Find 100 less and 100 more than a given 3-digit number by helping Kaylin and Quinten keep track of the place value party game points in this interactive tutorial.

 

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Place Value Party - Part 2:

Find 10 more and 10 less than 3-digit numbers with regrouping to help Kaylin and Quinten keep score at the place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Place Value Party - Part 1:

Mr. Mahoney challenges students to solve 10 less and 10 more problems in a place value party planning adventure in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Place Value Party - Part 3:

Find the value of 3-digit numbers which are 10 less with regrouping as Kaylin and Quinten keep score at a place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

MFAS Formative Assessments

Add 100 Mentally:

Students are given three-digit numbers and asked to mentally add 100 to each number.

Mentally Add 10 More:

Students are given three-digit numbers and asked to mentally add 10 to each number.

Mentally Subtract 100:

Students are given three-digit numbers and asked to mentally add 100 to each number.

Subtract 10 Mentally:

Students are given three-digit numbers and asked to mentally subtract 10 from each number.

Original Student Tutorials Mathematics - Grades K-5

Place Value Party - Part 1:

Mr. Mahoney challenges students to solve 10 less and 10 more problems in a place value party planning adventure in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Place Value Party - Part 2:

Find 10 more and 10 less than 3-digit numbers with regrouping to help Kaylin and Quinten keep score at the place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Place Value Party - Part 3:

Find the value of 3-digit numbers which are 10 less with regrouping as Kaylin and Quinten keep score at a place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Place Value Party - Part 4:

Find 100 less and 100 more than a given 3-digit number by helping Kaylin and Quinten keep track of the place value party game points in this interactive tutorial.

 

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Place Value Party - Part 5: 100 Less:

Learn how to create numbers that are 100 less as you wrap up the place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

 

Student Resources

Vetted resources students can use to learn the concepts and skills in this benchmark.

Original Student Tutorials

Place Value Party - Part 5: 100 Less:

Learn how to create numbers that are 100 less as you wrap up the place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

 

Type: Original Student Tutorial

Place Value Party - Part 4:

Find 100 less and 100 more than a given 3-digit number by helping Kaylin and Quinten keep track of the place value party game points in this interactive tutorial.

 

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Place Value Party - Part 2:

Find 10 more and 10 less than 3-digit numbers with regrouping to help Kaylin and Quinten keep score at the place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Place Value Party - Part 1:

Mr. Mahoney challenges students to solve 10 less and 10 more problems in a place value party planning adventure in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Place Value Party - Part 3:

Find the value of 3-digit numbers which are 10 less with regrouping as Kaylin and Quinten keep score at a place value party in this interactive tutorial.

This is part 1 in five-part series. Click below to view the other tutorials in the series.

Type: Original Student Tutorial

Parent Resources

Vetted resources caregivers can use to help students learn the concepts and skills in this benchmark.