Code | Description | |
MA.1.NSO.2.1: | Recall addition facts with sums to 10 and related subtraction facts with automaticity. | |
MA.1.NSO.2.2: | Add two whole numbers with sums from 0 to 20, and subtract using related facts with procedural reliability.
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MA.1.NSO.2.3: | Identify the number that is one more, one less, ten more and ten less than a given two-digit number. | |
MA.1.NSO.2.4: | Explore the addition of a two-digit number and a one-digit number with sums to 100.
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MA.1.NSO.2.5: | Explore subtraction of a one-digit number from a two-digit number.
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Access Point Number | Access Point Title |
MA.1.NSO.2.AP.1: | Recall addition facts with sums to 5 and related subtraction facts. |
MA.1.NSO.2.AP.2: | Apply a strategy for adding and subtracting two one-digit whole numbers to solve within 10. |
MA.1.NSO.2.AP.3: | Identify the number that is one more and one less than a given number within 20. |
MA.1.NSO.2.AP.4: | Explore the addition of a two-digit number from 11 to 19 and a one-digit number. |
MA.1.NSO.2.AP.5: | Explore subtraction of a one-digit number from a two-digit number from 11 to 19. |
Name | Description |
Ten More, Ten Less: | Explore strategies to add or subtract ten from a two-digit number in this interactive tutorial. |
Addition Switcheroo : | Change the order of the numbers in an addition sentence and use the counting on strategy to become quicker at your math facts in this interactive tutorial. |
Name | Description |
Pencils For School: | Students solve a word problem by subtracting a multiple of 10 from a multiple of 10. |
Using Addition and Subtraction Strategies: | Students solve two problems, each in more than one way, and are encouraged to use more sophisticated strategies. |
Ways to Solve A Problem: | Students are encouraged to use more sophisticated strategies to solve a part-part-whole problem. |
Use Strategies to Add and Subtract: | Students solve addition and subtraction problems by making tens, using a known fact, and by using a subtraction fact. |
Subtracting Ten: | Students subtract 10 from 50 and explain their strategies. |
Subtract Ten: | Students mentally subtract ten from a two-digit number. |
Pages in a Book: | Students are asked to solve a word problem by mentally subtracting 10. |
Packages of Pencils: | Students subtract a multiple of 10 from a multiple of 10. |
Muffins: | Students add a one-digit number to a two-digit number that requires composing a ten. |
More Than One Way to Solve a Problem: | Students solve an addition and a subtraction problem in more than one way. |
Keisha’s Shells: | Students mentally add ten to a given number of shells. |
Justifying the Commutative Property of Addition: | Students work with cubes or color tiles to understand and justify the Commutative Property of addition. |
First Graders Present on Tuesday: | Students solve a problem by mentally adding ten 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. |
Name | Description |
Ants, Hot Dogs, and Fish...Oh, My!: | The learner will relate counting to addition and subtraction by using the strategies "Counting On" and "Counting Back". This lesson engages students through the use of short videos, manipulatives, literature, and games. |
"Cross It Out": | This lesson helps first grade students develop their 'counting on' and 'counting back' strategies. It also lays a strong foundation for working with the base ten system. Teach your students how to play the game "Cross It Out" where they will be able to pick any number on a 120 chart that is greater than 11 and less than 110, and then count on 1 more and 10 more than their number and 1 less and 10 less than their number. Once your students have mastered counting on and counting back and know how to skip count by tens you can introduce this game. |
Duck Addition: | Students will listen to the book, Quack and Count by Keith Baker, and use the information in the book along with manipulatives to create addition equations. Students will then relate the addition equation to a subtraction equation. Specifically, students will be working on creating the addition and related subtraction facts with the number combinations for 7. |
Counting Coral Reef Babies: | Students will listen to the book Over in the Ocean in a Coral Reef, by Marianne Berkes. They will participate in an inquiry to figure out how many baby animals are in the book. They will show the number of animals in the book in groups of ten and some left over. This lesson is a beginning place value and addition lesson for first grade. |
Show What You Know: Addition and Subtraction Strategies Project: | This project is to be used at the end of the school year once all the addition and subtraction strategies have been taught. This is a review of the strategies and is an excellent way for students to show what they know about their understanding of addition and subtraction strategies. |
Think Addition and Make a Ten to Subtract: | This lesson will teach students a strategy to subtract one-digit numbers from teen numbers by thinking addition and making-a-ten using double ten frames and two-color counters. This lesson supports previous work with restating subtraction problems as missing addend problems. |
Best Babysitter: | Teams of students will use math to solve an open-ended, real-world problem to help their parent or caregiver choose the best babysitter. Students will apply mathematical skills of place value (two-digit number tens and ones) and counting to perform math calculations while analyzing data sets. This MEA will facilitate students demonstrating higher level critical thinking and problem solving during class discussions and in writing. 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. |
Using the "Make-a-Ten" Strategy to Add: | In this lesson, students will use the "make-a-ten" strategy to add two whole numbers within 20. Students will utilize a ten frame and 2-color counters to complete this activity. |
Over a Hundred Hungry Ants: Counting to 120: | In this fun lesson, students will use ant manipulatives, hundred charts and the book "One Hundred Hungry Ants" to show how to count to 100 and 120 starting on any given number. |
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. |
Subtracting 9 the: | In this lesson, students will use the hundreds chart to discover a strategy to subtract 9 from different numbers. Students will learn and practice the compensation strategy of subtracting 10 and then adding 1 back to get the final difference. Students will also learn and practice visualizing to “mentally see” the hundreds chart and use it as an efficient mental math strategy to subtract 9 from any given two-digit number. |
Adding and Subtracting Ten Challenge: | Students will learn to identify the number that is ten more or ten less than any given two-digit number by playing a game. |
Adding 9 the: | In this lesson, students will use the hundreds chart to discover a strategy to add 9 to different numbers. Students will then learn to visualize the hundreds chart as an efficient mental math strategy to add 9 to any given two-digit number. |
Adding & Subtracting Ten from Multiples of 10: | In this lesson, students will play a game involving adding ten to, and subtracting ten from, multiples of ten. In the follow-up lesson, Adding and Subtracting Ten Challenge (Resource ID#: 45832), students will use the foundation gained in this lesson to find ten more and ten less than any given two-digit number. |
Let's Have Fun With Ten More and Ten Less: | In this lesson, students will find ten more and ten less than any given two-digit number on a hundreds chart. They will learn about and identify the patterns that evolve when this task is performed. Then students will mentally find and write ten more and ten less independently. |
Thinking Addition to Solve Subtraction Problems: | Students will use strategies related to using reliable methods to find sums to ten. |
Creature Island: | This lesson outlines a game that is a fun and engaging to practice the make a ten strategy, within 20. |
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. |
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. |
Ten-Hut! Part-2 (Subtraction): | This fun, kinesthetic lesson allows students to gain insight into how to use place value when subtracting a one-digit number from a two-digit number. The focus is on students using their bodies, as well as math manipulatives, to solve subtraction problems within 100 that do not require regrouping. |
Lining Up... How can we use counting to help us line up?: | In this lesson, students will use counting strategies to help them line up in numerical order using numbers from 1 to 120. They will also use hundred charts to help find missing numbers in a number sequence. |
Mentally Adding and Subtracting Ten: | Students will learn strategies to identify ten more and ten less than a given two-digit number. The lesson begins concretely using base-ten blocks, then to the representational using a hundred chart. Ultimately, the lesson moves to the abstract level where students mentally identify ten more and ten less than a given two-digit number. |
Coin Combinations: How else can you pay for that?: | In this lesson, students will learn that there can be multiple ways (multiple coin combinations) to reach a given money amount. Using money manipulatives, students will work cooperatively and independently to practice finding different coin combinations for a given money amount. Students will also become comfortable knowing that there are multiple ways to reach a correct answer. |
Dangerous Doubles (Doubling Numbers): | This lesson teaches students to use the strategy doubling numbers and doubles plus or minus one in order to use mental math to add one-digit numbers. The students are engaged in learning through the read-aloud of "Double the Ducks" by Stephen Murphy and then get to work with a partner to draw doubles and write equations that relate to their drawings. Students individually work on solving word problems using these strategies and manipulatives as necessary to solve. |
Piece of Cake Mental Math!: | In this lesson, you will find activities that you can use to enable student learning and application of mental math addition (using the make a ten strategy) without using rote memorization. |
Name | Description |
Fluency vs. Automaticity: | How are fluency and automaticity defined? Dr. Lawrence Gray explains fluency and automaticity in the B.E.S.T. mathematics benchmarks in this Expert Perspectives video. |
B.E.S.T. Journey: | What roles do exploration, procedural reliability, automaticity, and procedural fluency play in a student's journey through the B.E.S.T. benchmarks? Dr. Lawrence Gray explains the path through the B.E.S.T. mathematics benchmarks in this Expert Perspectives video. |
What is Automaticity?: | What does automaticity look like? What is the role of automaticity in mathematics? Dr. Lawrence Gray explores what it means for students to have automaticity with basic mathematics facts in this Expert Perspectives video. |
Name | Description |
Connecting Geometry to Numbers: | Unlock an effective teaching strategy for connecting geometry and numbers in order to build number sense in this Teacher Perspectives video for educators. |
Name | Description |
Kiri's Mathematics Match Game: | In all versions, students must engage basic addition and subtraction facts. In the memory version, after a student has turned over one card, in order to know whether there is a match using cards they've seen, they need to to solve equations of the form ?+b=c, b+?=c, ?-b=c, and b-?=c. |
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 7 + 6 Using a Number Line and Objects to Count: | In this tutorial, you will learn how to add 7 + 6 using a number line and objects to count. |
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 while subtracting ones: | Learn how to subtract 4 from 46 by thinking about place value. |
Title | Description |
Ten More, Ten Less: | Explore strategies to add or subtract ten from a two-digit number in this interactive tutorial. |
Addition Switcheroo : | Change the order of the numbers in an addition sentence and use the counting on strategy to become quicker at your math facts in this interactive tutorial. |
Title | Description |
Adding 8 + 7: | Learn how to add 8 + 7 by making a group of ten. |
Adding 7 + 6 Using a Number Line and Objects to Count: | In this tutorial, you will learn how to add 7 + 6 using a number line and objects to count. |
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 while subtracting ones: | Learn how to subtract 4 from 46 by thinking about place value. |
Title | Description |
Kiri's Mathematics Match Game: | In all versions, students must engage basic addition and subtraction facts. In the memory version, after a student has turned over one card, in order to know whether there is a match using cards they've seen, they need to to solve equations of the form ?+b=c, b+?=c, ?-b=c, and b-?=c. |
Title | Description |
Adding 7 + 6 Using a Number Line and Objects to Count: | In this tutorial, you will learn how to add 7 + 6 using a number line and objects to count. |
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 while subtracting ones: | Learn how to subtract 4 from 46 by thinking about place value. |