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2nd Grade Magic of Math Unit 10:  Unknown Numbers and 10 & 100 More and Less
The Magic Of Math Unit 10 (a 2-Week Unit) for SECOND GRADE focuses on: Week 1: Unknown Numbers in Addition and Subtraction Equations and Word Problems Week 2: Adding and Subtracting 10 and 100 (10 More, Less/ 100 More, Less) Here is what is included in this two week long unit for 2nd grade:

Also included in: 2nd Grade Magic of Math THE BUNDLE

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Unknown Number Flip Cards- Addition and Subtraction
Introduce equations with unknown numbers using these hands-on flip cards. Print, cut and laminate cards. Fold each tab over and secure with a paper clip. Use the flip cards during a hands-on lesson, or as a math center. Meets Common Core Standard 1.OA.8: Determine the unknown whole number in an
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Unknown Number in Multiplication or Division Equation-3rd Grade Math OA.4 & OA.6
These activities have been designed to practice third grade Math Common Core Standards OA.4 / OA.A,4 and OA.6 / OA.B.6. OA.4 / OA.A,4 Determine the unknown whole number in a multiplication or division equation relating three whole numbers. OA.6 / OA.B.6 Understand division as an unknown-factor pro
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Interactive Notebook Activities - Unknown Numbers {3.OA.4}
This is a set of activities to use in your math interactive notebooks. This set is aligned with the following Common Core standard in the Operations and Algebraic Thinking domain: CCSS.Math.Content.3.OA.A.4 Determine the unknown whole number in a multiplication or division equation relating three w
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Case of the Missing Number: Solving for Unknown Numbers math centers
This unit is aligned to Common Core State Standard 1.OA.8. So whether you use this unit to supplement your current resource, or use it as a part of your math centers have fun teaching your students how to solve for unknown whole numbers with this engaging and fun unit! In this unit you will rece
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Unknown Numbers in Multiplication Division {3.5D, 3.OA.4} Activity & Task Cards
This set includes a hands-on activity and 2 sets of task cards that are aligned with the 3rd grade Math TEKS 3.5D and 3.OA.4 Determine the unknown whole number in a multiplication or division equation relating three whole numbers. Students will use fact families to manipulate and create equations
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Determine Unknown Numbers for Multiplication and Division Equations Puzzles
These Multiplication and Division Number Puzzles help students learn their multiplication facts. They are simple puzzles to determine an unknown number. There are three version of the number puzzles: • One version has four problems / answers in one puzzle. It’s simply a fun way to get four pr

Also included in: Number Puzzles for Third Grade BUNDLE

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Unknown Numbers | OA 1.8| No Prep Tasks | Assessment | Worksheets
This NO PREP packet of activities and assessments was designed to give your students a chance to practice determining the unknown whole number (within 20) in addition and subtraction equations. Some activities require kiddos to cut and paste and others simply require a pencil. These are great for wh
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Scoot for Unknown Numbers
Scoot for Unknown Numbers Finding an unknown product is fairly easy for students who have mastered multiplication and division facts. (5 x 4 = ?) However, solving the problem becomes more difficult when the product is known but one of the factors is unknown. (5 x ? = 20) This Scoot activity give
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Unknown Numbers Math Tasks and Exit Tickets
This set is the perfect tool to teach your students the eighth Operations and Algebraic standard in the common core. By completing the activities in this set, your students will understand how to determine the unknown whole number in an addition or subtraction equation. Included in This Download:

Also included in: Addition and Subtraction Bundle 1st Grade

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Story Problems Addend Unknown/Difference Unknown on a Number Line #s up to 100
Math story problems relating an unknown addend & unknown difference using a number line. Students try to reach numbers up to a hundred from a given number using a number line. Addition and Subtraction Problem Solving Center Task Cards. Students find the difference between 2 numbers by findi
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Find the unknown number - 3rd Grade 3.OA.A.4
Operations & Algebraic Thinking - Multiplication and Division Task Cards! Common Core aligned to 3.OA.A.4 Determine the unknown whole number in a multiplication or division equation relating three whole numbers. Contents: 3 sets of 28 task cards Answer Keys Recording Sheets 2 set of Brain br
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Unknown Numbers NO PREP Practice Sheets
Your students will get plenty of practice on solving math equations with unknown numbers (result unknown, change unknown, start unknown). The packet helps students to use variety of methods such as 10 frames, number bonds, related fact, and number lines. There are also more advanced pages with equat
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Unknown Numbers in Addition and Subtraction Equations First Grade Task Cards
First graders will practice finding missing addends and unknown numbers in subtraction equations using this Common Core aligned bundle of task cards. There are three sets of task cards included, featuring fun colorful designs. Set 1 practices finding unknown numbers in addition equations, Set 2 p
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Finding Unknown Numbers in Addition and Subtraction Equations
Help students understand basic algebra with addition and subtraction with the scaffolded packet. Students start by figuring out what number an alligator clip art is covering. They can also create their own problems by cutting out and placing their own alligators. These add your own alligator pages a
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1.OA.8 1st Grade Math Jeopardy Game - Determine The Unknown Number
1.OA.8 First Grade Common Core Math Jeopardy Game 1 OA.8 Determine The Unknown Number Practice provides two ways for students to practice finding the unknown whole number in an addition or subtraction equation. Jeopardy board includes 25 distinct problems and utilizes hyperlinks to award/deduct mon
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Addition and Subtraction Task Cards up to 20 with Unknown Number Cards
Task cards are a wonderful tool to use in your classroom. You can use them in a math center, in a small group, as independent work, or as an assessment. This file contains 60 addition and subtraction task cards up to 20. This file includes task cards with the unknown number. These task cards would
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1st Grade Common Core Math Worksheets Determine the Unknown Number 1.OA.8
1st Grade Common Core Addition and Subtraction: Determine the Unknown Number Worksheets (1.OA.8) The attachment is a packet of five days of worksheets for first grade common core standard 1.OA.8 Determine the unknown whole number in an addition or subtraction equation relating to three whole number
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Unknown Numbers: 3 Task Card Sets {1st Grade}
Does your class need to practice the standards within Operations and Algebraic Thinking! This insected themed unit is packed with plenty of opportunities to practice standards finding the unknown number in an equation and understanding the equals sign in an equation. Unknown numbers can be a challen
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3.5D Unknown Number in Multiplication/Division Comp. Task Cards STAAR
TEK: 3.5D The focus of these task cards is ALL DETERMINE UNKNOWN NUMBER IN MULTIPLICATION/DIVISION COMPUTATION TASK CARDS all aligned with STAAR (a hard resource to find). These task cards have you summarize, solve and interpret each form of data. Test prep can be a turn-off for students, but they
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Unknown Numbers Subtraction Equations 1.OA.8
Use these worksheets and games to introduce and practice subtraction equations with an unknown number. It is all aligned with CCSS Math.Content.1.OA.D.8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. Contents: 4 different worksheet designs w
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1st Grade Common Core Math 1 OA.8 Determine The Unknown Number 1.OA.8
First Grade Common Core Math 1 OA.8 Determine The Unknown Number 1.OA.8 Practice provides two ways for students to practice finding the unknown whole number in an addition or subtraction equation. It includes 40 distinct problems in two sets (129 slides in all!), with and without following answer
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Unknown Number Practice Pages
These Unknown Number Practice pages are a resource for providing students with practice in determining the missing number in addition problems. Students are able to use shaded boxes to help them solve the problems. This packet includes 8 practice pages.
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Unknown Numbers Addition Equations 1.OA.8
Use these worksheets and games to introduce and practice addition equations with an unknown number. It is all aligned with CCSS Math.Content.1.OA.D.8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. Contents: 4 different worksheet designs with
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