Standard #: MAFS.1.NBT.3.4 (Archived Standard)


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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.


General Information

Subject Area: Mathematics
Grade: 1
Domain-Subdomain: Number and Operations in Base Ten
Cluster: Level 2: Basic Application of Skills & Concepts
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 2: Basic Application of Skills & Concepts - More Information
Date of Last Rating: 02/14
Status: State Board Approved - Archived

Related Courses

Course Number1111 Course Title222
5012030: Mathematics - Grade One (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7712020: Access Mathematics Grade 1 (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 Resources

Educational Games

Name Description
Jetstream Riders:A high flying Addition Game


Fly high in a hot air balloon and catch the jet stream to go faster! Use addition to add hot air, and see if you can win against other students!

This is a single level basic version. Teachers can register for additional levels for practicing subtraction, multipiication and division.

The Game of Tens and Ones: A Lesson for Second Graders "This game gives children practice with adding and subtracting ones and tens. Using a special die, two 0 99 charts, and two markers, children play in pairs. During the course of a game, they calculate between 20 and 30 addition and subtraction problems." (from Math Solutions Professional Development)

Educational Software / Tool

Name Description
Hundreds Chart

A printable hundreds chart featuring a 10x10 table numbered 1 to 100. (found on Illuminations website under "Trading for Quarters")

Formative Assessments

Name Description
Muffins

Students add a one-digit number to a two-digit number that requires composing a ten.

Jumping Rope

Students add a multiple of 10 to a two-digit number.

Adding Within 100

Students add a one-digit number to a two-digit number and are asked to relate the strategy used to a written method.

Adding Tens to Numbers

Students add a multiple of 10 to a two-digit number and are asked to relate the strategy used to a written method.

Lesson Plans

Name Description
Let's Play!

The fundraiser was a huge success! Now students must decide the best way to spend the money to buy new playground equipment.

Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. Click here to learn more about MEAs and how they can transform your classroom.

Finding Ten More and Ten Less with Justen

In this lesson, students will use manipulatives to decompose two-digit numbers into tens and ones. The students will then find ten more or ten less by adding or subtracting “just ten”. This will also be demonstrated on a hundreds chart.

Race to 99

Students will play a game with tens and ones in a place value chart to ultimately reach 99. Students will physically manipulate unifix cubes or place value blocks to add on one-digit numbers to two-digit numbers, composing new tens when necessary. Students will write equations to represent the addition situations that have been generated.

Make a Ten To Make Adding Easy!

In this lesson students will add two-digit numbers to one-digit numbers by using the "make a ten" strategy. Students will decompose a two-digit number using expanded form, make a ten, and then add. This lesson is an important lesson for students to be able to add greater numbers as they get into higher grade levels.

Ten-Hut!

This lesson allows students to gain insight into how to use place value when adding a two-digit number and a one-digit number. The focus is on students using their bodies, as well as math manipulatives, to solve addition problems within 100 that do not require regrouping.

Original Student Tutorial

Name Description
Ten More, Ten Less

Explore strategies to add or subtract ten from a two-digit number in this interactive tutorial.

Tutorials

Name Description
Subtracting 14 - 6

Learn how to subtract 14 - 6 by first thinking about subtracting 2 and 4.

Adding 8 + 7

Learn how to add 8 + 7 by making a group of ten.

Adding two-digit numbers without regrouping

In this tutorial video from Khan Academy, explore adding two-digits numbers with base ten blocks and connect this to the standard algorithm. The examples do not include regrouping.

Adding by getting to group of 10 first

In this tutorial video from Khan Academy, explore how making a ten can help to make thinking about addition easier. This video includes an example of adding a one-digit number to a two-digit number by decomposing the one-digit number.

Understanding place value when subtracting tens

In this video tutorial from Khan Academy, explore the connection between place value and subtraction. This video explains how to solve a subtraction problem with numbers less than one hundred using base ten blocks.

Understanding place value while subtracting ones

Learn how to subtract 4 from 46 by thinking about place value.

Understanding place value while adding tens

Learn how to add 23 + 30 by thinking about place value.

Student Resources

Original Student Tutorial

Name Description
Ten More, Ten Less:

Explore strategies to add or subtract ten from a two-digit number in this interactive tutorial.

Educational Game

Name Description
Jetstream Riders:A high flying Addition Game:


Fly high in a hot air balloon and catch the jet stream to go faster! Use addition to add hot air, and see if you can win against other students!

This is a single level basic version. Teachers can register for additional levels for practicing subtraction, multipiication and division.

Educational Software / Tool

Name Description
Hundreds Chart:

A printable hundreds chart featuring a 10x10 table numbered 1 to 100. (found on Illuminations website under "Trading for Quarters")

Tutorials

Name Description
Adding 8 + 7:

Learn how to add 8 + 7 by making a group of ten.

Adding two-digit numbers without regrouping:

In this tutorial video from Khan Academy, explore adding two-digits numbers with base ten blocks and connect this to the standard algorithm. The examples do not include regrouping.

Adding by getting to group of 10 first:

In this tutorial video from Khan Academy, explore how making a ten can help to make thinking about addition easier. This video includes an example of adding a one-digit number to a two-digit number by decomposing the one-digit number.

Understanding place value when subtracting tens:

In this video tutorial from Khan Academy, explore the connection between place value and subtraction. This video explains how to solve a subtraction problem with numbers less than one hundred using base ten blocks.

Understanding place value while subtracting ones:

Learn how to subtract 4 from 46 by thinking about place value.

Understanding place value while adding tens:

Learn how to add 23 + 30 by thinking about place value.



Parent Resources

Educational Software / Tool

Name Description
Hundreds Chart:

A printable hundreds chart featuring a 10x10 table numbered 1 to 100. (found on Illuminations website under "Trading for Quarters")

Tutorials

Name Description
Adding two-digit numbers without regrouping:

In this tutorial video from Khan Academy, explore adding two-digits numbers with base ten blocks and connect this to the standard algorithm. The examples do not include regrouping.

Adding by getting to group of 10 first:

In this tutorial video from Khan Academy, explore how making a ten can help to make thinking about addition easier. This video includes an example of adding a one-digit number to a two-digit number by decomposing the one-digit number.

Understanding place value when subtracting tens:

In this video tutorial from Khan Academy, explore the connection between place value and subtraction. This video explains how to solve a subtraction problem with numbers less than one hundred using base ten blocks.

Understanding place value while subtracting ones:

Learn how to subtract 4 from 46 by thinking about place value.

Understanding place value while adding tens:

Learn how to add 23 + 30 by thinking about place value.



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